https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-estimating-mass/v/metric-weight 2021-07-07T20:19:25Z Metric system: units of weight Sal discusses metric units of mass or weight such as milligram, gram, and kilogram. Sal Khan video https://cdn.kastatic.org/googleusercontent/0kGpROWBRbnrOk7OCNUGG4CmKqGuSPOKFsaWpB3wO7g8wy5aniFPM14D3Zn1cyf6OUBkwr1SeW3s6ABvy00FuRU Metric system: units of weight Sal discusses metric units of mass or weight such as milligram, gram, and kilogram. https://cdn.kastatic.org/ka-youtube-converted/TD1zuENbEdk.mp4/TD1zuENbEdk.mp4 266 Measurement and conversion https://www.khanacademy.org/math/cc-third-grade-math/imp-measurement-and-data/imp-mass/e/estimating-mass 2021-06-30T20:49:31Z Estimate mass (grams and kilograms) Practice estimating the mass of real life objects using grams and kilograms. Lindsay exercise https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-estimating-length/v/metric-distance 2021-07-07T20:19:24Z Metric system: units of distance Sal discusses metric units of length or distance such as millimeter, centimeter, meter, and kilometer. Sal Khan video https://cdn.kastatic.org/googleusercontent/ETWlwNE4CDpadeIuyb_C7QU3-QjMORCg4AzPWSv4W5Eb0zIPXIGWub4RzgQWI5TGBGBCeNt4i3fwAzft-tTryNxH Metric system: units of distance Sal discusses metric units of length or distance such as millimeter, centimeter, meter, and kilometer. https://cdn.kastatic.org/ka-youtube-converted/I3kQJvR7ZIg.mp4/I3kQJvR7ZIg.mp4 416 Measurement and conversion https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-estimating-length/e/estimating-length--millimeters--centimeters--meters--kilometers- 2021-06-30T20:49:37Z Estimating length (mm, cm, m, km) Practice estimating the length of real life objects using metric units. Lindsay exercise https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-estimating-volume/v/metric-units-of-volume 2021-05-07T00:21:37Z Metric system: units of volume Learn about metric units of volume or capacity such as milliliter and liter. Sal Khan video https://cdn.kastatic.org/googleusercontent/5gZgDpIW41XMWQ_bIrNUBtrUNtA_LlexIr_zJ6iL3DGHAqZ7ZH-3VMBlN3aK24P4-GeWF6ik27unwnGMT482oUMx Metric system: units of volume Learn about metric units of volume or capacity such as milliliter and liter. https://cdn.kastatic.org/ka-youtube-converted/LhMEqsL_M5o.mp4/LhMEqsL_M5o.mp4 254 Measurement and conversion https://www.khanacademy.org/math/cc-third-grade-math/imp-measurement-and-data/imp-volume/e/estimating-volume 2021-06-30T20:49:26Z Estimate volume (milliliters and liters) Practice estimating the volume of real life objects using milliliters and liters. Lindsay exercise https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-conversion-word-problems/v/metric-system-unit-conversion-examples 2021-06-30T20:49:36Z Multi-step unit conversion examples (metric) Sal solves multi-step unit conversion examples with metric units of measure. video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Multi-step unit conversion examples (metric) Sal solves multi-step unit conversion examples with metric units of measure. https://cdn.kastatic.org/ka-youtube-converted/ODJzxGj_zvU.mp4/ODJzxGj_zvU.mp4 323 Measurement and conversion https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-conversion-word-problems/v/multi-step-unit-conversion-examples 2022-10-06T09:48:27.705455518Z Multi-step unit conversion examples (U.S. Customary) Sal solves multi-step unit conversion example using U.S. Customary units of measure. video https://cdn.kastatic.org/ka_thumbnails_cache/70206c25-59f4-439e-b4c4-3e7f8b38bdd3_1280_720_base.png Multi-step unit conversion examples (U.S. Customary) Sal solves multi-step unit conversion example using U.S. Customary units of measure. https://cdn.kastatic.org/ka-youtube-converted/5QFwaG5oM_A.mp4/5QFwaG5oM_A.mp4 337 Measurement and conversion https://www.khanacademy.org/math/strengthened-shs-general-math-3-terms/x52e1fe4f21d4618e:first-term/x52e1fe4f21d4618e:measurement-and-conversion/a/converting-units 2025-08-05T13:55:56.908227921Z Converting units New content on this topic will come during the summer of 2026. article https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-conversion-word-problems/e/metric-conversions-word-problems 2026-04-30T18:30:41.846286703Z Metric conversions word problems Practice metric length, volume, and mass problems that require expressing measurements given in a larger unit in terms of a smaller unit. Lindsay exercise https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-conversion-word-problems/e/us-customary-conversion-word-problems 2022-07-26T19:59:03.453693248Z US customary conversion word problems Practice US customary length, volume, and mass problems that require expressing measurements given in a larger unit in terms of a smaller unit. Lindsay exercise https://www.khanacademy.org/math/grade-8-math-tx/x42e41b058fcf4059:measurement-of-three-dimensional-figures/x42e41b058fcf4059:prisms/v/lateral-total-surface-area-of-rectangular-prisms 2024-04-15T13:20:13.302562643Z Lateral & total surface area of rectangular prisms Practice finding the lateral surface area and total surface area of a rectangular prism using the formulas instead of nets. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/eb333256-ecdf-4fd0-9ebf-15fbcf89605e_1280_720_base.png Lateral & total surface area of rectangular prisms Practice finding the lateral surface area and total surface area of a rectangular prism using the formulas instead of nets. https://cdn.kastatic.org/ka-youtube-converted/EeaSMjBKRcA.mp4/EeaSMjBKRcA.mp4 295 Measurement and conversion https://www.khanacademy.org/math/grade-8-math-tx/x42e41b058fcf4059:measurement-of-three-dimensional-figures/x42e41b058fcf4059:prisms/v/lateral-total-surface-area-of-triangular-prisms 2024-04-15T13:20:13.302562643Z Lateral & total surface area of triangular prisms Practice finding the lateral surface area and total surface area of a triangular prism using the formulas instead of nets. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/cd8bbe8b-d858-4704-ad01-9267a042d5e1_1280_720_base.png Lateral & total surface area of triangular prisms Practice finding the lateral surface area and total surface area of a triangular prism using the formulas instead of nets. https://cdn.kastatic.org/ka-youtube-converted/zFPCdP_zaa8.mp4/zFPCdP_zaa8.mp4 404 Measurement and conversion https://www.khanacademy.org/math/grade-8-math-tx/x42e41b058fcf4059:measurement-of-three-dimensional-figures/x42e41b058fcf4059:prisms/e/lateral-total-surface-area-of-prisms 2024-04-23T18:41:07.994610091Z Lateral & total surface area of prisms Practice finding the lateral surface area and total surface area of rectangular prisms and triangular prisms. Esther Mobille exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/cc-6th-surface-area/e/surface-area-word-problems 2026-03-31T08:52:19.062243676Z Surface area word problems Solve word problems that involve surface area of pyramids and prisms. Lindsay exercise https://www.khanacademy.org/math/7th-grade-math-eureka-squared-aligned/x314834f71a55c568:geometry/x314834f71a55c568:surface-area-of-right-prisms/v/total-and-lateral-surface-area-using-a-net-rectangular-pyramid 2026-06-28T06:10:43.273136997Z Total and lateral surface area using a net rectangular pyramid A rectangular pyramid has 5 faces, a rectangular base and 4 triangular lateral faces. Given the net of a rectangular pyramid, let's determine the lateral and total surface area of the figure. The total surface area is the area of all the faces, and the lateral surface area leaves out the base. Sal Khan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Total and lateral surface area using a net rectangular pyramid A rectangular pyramid has 5 faces, a rectangular base and 4 triangular lateral faces. Given the net of a rectangular pyramid, let's determine the lateral and total surface area of the figure. The total surface area is the area of all the faces, and the lateral surface area leaves out the base. https://cdn.kastatic.org/ka-youtube-converted/rKSZA9sHNlY.mp4/rKSZA9sHNlY.mp4 229 Measurement and conversion https://www.khanacademy.org/math/7th-grade-math-eureka-squared-aligned/x314834f71a55c568:geometry/x314834f71a55c568:surface-area-of-right-pyramids/a/surface-area-of-right-pyramids 2025-09-29T14:00:43.294473851Z Surface area of right pyramids We have combined this lesson with a similar lesson to make things easier for you. article https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:surface-area-of-cuboid-and-cube/v/surface-area-of-a-box-cuboid-indian-accent 2025-06-06T15:33:38.563209632Z Surface area of a box (cuboid) Surface area is total area on the surface of a three-dimensional shape. To find the surface area of a cuboid which has 6 rectangular faces, add the areas of all 6 faces. Or, you can label the length (l), width (w), and height (h) of the cuboid and use the formula: surface area (SA)=2lw+2lh+2hw. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Surface area of a box (cuboid) Surface area is total area on the surface of a three-dimensional shape. To find the surface area of a cuboid which has 6 rectangular faces, add the areas of all 6 faces. Or, you can label the length (l), width (w), and height (h) of the cuboid and use the formula: surface area (SA)=2lw+2lh+2hw. https://cdn.kastatic.org/ka-youtube-converted/a_6u4T5nODA.mp4/a_6u4T5nODA.mp4 146 Measurement and conversion https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:cylinder/v/surface-area-of-cylinders-formula-indian-accent 2025-06-09T09:58:43.937294419Z Surface area of cylinders formula Use previous knowledge of surface area to make connections to the formulas for lateral and total surface area of cylinders. Courses on Khan Academy are always 100% free. Start practising—and saving your progress—now! (add course link here) Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Surface area of cylinders formula Use previous knowledge of surface area to make connections to the formulas for lateral and total surface area of cylinders. Courses on Khan Academy are always 100% free. Start practising—and saving your progress—now! (add course link here) Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by https://cdn.kastatic.org/ka-youtube-converted/fPWgtycCHvQ.mp4/fPWgtycCHvQ.mp4 240 Measurement and conversion https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:cylinder/e/mensuration-18d 2025-02-18T07:52:09.551150445Z Surface area of a cylinder Mensuration ashish exercise https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:surface-area-of-cuboid-and-cube/e/b8-surface-area-of-cube-and-cuboid 2025-02-24T09:39:19.049669771Z Surface area of cube and cuboid Surface area of cube and cuboid ashish exercise https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:right-circular-cone/v/surface-area-of-a-cone-computation 2024-01-17T09:27:58.785224568Z Surface area of a cone: Computation This video describes how to compute the surface area of cone, and what terms are involved in it. Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Surface area of a cone: Computation This video describes how to compute the surface area of cone, and what terms are involved in it. https://cdn.kastatic.org/ka-youtube-converted/c8Xx7zfStrA.mp4/c8Xx7zfStrA.mp4 305 Measurement and conversion https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:right-circular-cone/e/mensuration-18-e 2026-05-12T22:10:47.015864082Z Surface area of a cone Mensuration ashish exercise https://www.khanacademy.org/math/revision-term-1-od-math-class-10/x03e14a980a7a91ad:week-3/x03e14a980a7a91ad:mensuration/v/surface-area-of-sphere-computation-and-sense-of-formula 2024-01-17T11:25:19.383730229Z Surface area of sphere: computation and sense of formula Why Is the formula for surface area of sphere equal to 4pir^2? And applying its formula to find the surface area. Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Surface area of sphere: computation and sense of formula Why Is the formula for surface area of sphere equal to 4pir^2? And applying its formula to find the surface area. https://cdn.kastatic.org/ka-youtube-converted/IZ4DpWYO3kY.mp4/IZ4DpWYO3kY.mp4 270 Measurement and conversion https://www.khanacademy.org/math/revision-term-1-od-math-class-10/x03e14a980a7a91ad:week-3/x03e14a980a7a91ad:mensuration/e/surface-area-of-spheres 2026-03-07T07:50:55.659331768Z Surface area of spheres Let's solve some problems and apply the formula for the surface area of spheres. Aakash Bagga exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/cc-6th-surface-area/a/surface-area-review 2026-03-31T08:44:48.259988263Z Surface area review Review surface area and try some practice problems. article https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/cc-6th-surface-area/v/surface-area-word-problem-example 2023-09-21T21:49:35.177342261Z Surface area word problem example Akira won a science fair and got a golden pyramid trophy. We want to find out how much gold foil was used. The trophy has a square base and four triangular faces. By calculating the area of these shapes, we can find the total surface area covered by the gold foil. video https://cdn.kastatic.org/ka_thumbnails_cache/f197e8ba-6c6d-454e-abb0-4e86e4a315d6_1280_720_base.png Surface area word problem example Akira won a science fair and got a golden pyramid trophy. We want to find out how much gold foil was used. The trophy has a square base and four triangular faces. By calculating the area of these shapes, we can find the total surface area covered by the gold foil. https://cdn.kastatic.org/ka-youtube-converted/ODNCH3gSKdA.mp4/ODNCH3gSKdA.mp4 275 Measurement and conversion https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/cc-6th-surface-area/e/surface-areas 2026-03-10T04:30:37.966653692Z Surface area Practice finding the surface area of 3D objects. Rhonda Hughes exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/cc-6th-surface-area/a/surface-area-versus-volume 2024-01-26T15:42:31.425218268Z Surface area versus volume A 3D figure has both surface area and volume measurements, but we use them for different purposes. Learn the difference and when to use each. article https://www.khanacademy.org/math/geometry/hs-geo-solids/hs-geo-solids-intro/v/solid-geometry-volume 2021-06-30T20:49:30Z Volume of triangular prism & cube Using the formulas for the volume of triangular prism and cube to solve some solid geometry problems. Sal Khan video https://cdn.kastatic.org/googleusercontent/qYxEE09hkJ133DSfdZOZLHTXHSWqvVhLs4UGM4widVZTV46cTQ1be06jB78OdD3esWDEBLZav_lbtyXL-ELc9AUPxg Volume of triangular prism & cube Using the formulas for the volume of triangular prism and cube to solve some solid geometry problems. https://cdn.kastatic.org/ka-youtube-converted/ZqzAOZ9pP9Q.mp4/ZqzAOZ9pP9Q.mp4 236 Measurement and conversion https://www.khanacademy.org/math/5th-grade-math-eureka-squared-aligned/xaf06646de8e27a4f:addition-and-multiplication-with-area-and-volume/xaf06646de8e27a4f:find-the-volumes-of-right-rectangular-prisms-by-multiplying-the-edge-lengths/v/volume-of-a-rectangular-prism-indian-accent 2025-06-08T17:06:50.364590398Z Volume of a rectangular prism If you want to know how much stuff you can cram into a box, finding its volume is key. To calculate the volume of a box, you need to know its height, width, and depth. You can find the volume by multiplying these three dimensions together. This formula works regardless of the units you are using (e.g. meters, feet), he method is the same - just make sure your units match up! Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Volume of a rectangular prism If you want to know how much stuff you can cram into a box, finding its volume is key. To calculate the volume of a box, you need to know its height, width, and depth. You can find the volume by multiplying these three dimensions together. This formula works regardless of the units you are using (e.g. meters, feet), he method is the same - just make sure your units match up! https://cdn.kastatic.org/ka-youtube-converted/tsyxs2DtRqA.mp4/tsyxs2DtRqA.mp4 119 Measurement and conversion https://www.khanacademy.org/math/7th-grade-math-eureka-squared-aligned/x314834f71a55c568:geometry/x314834f71a55c568:volume-of-prisms/v/volume-of-rectangular-pyramid-part-2-rectangular-prism 2024-11-05T21:45:04.933889973Z Volume of rectangular pyramids using rectangular prisms Explore why the formula for the volume of a rectangular pyramid has a 1/3 in it! We'll investigate a general rectangular prism. Kate Garfinkel video https://cdn.kastatic.org/ka_thumbnails_cache/18208f56-1c91-4245-9848-92df39b93b3c_1280_720_base.png Volume of rectangular pyramids using rectangular prisms Explore why the formula for the volume of a rectangular pyramid has a 1/3 in it! We'll investigate a general rectangular prism. https://cdn.kastatic.org/ka-youtube-converted/PPey8fjuH84.mp4/PPey8fjuH84.mp4 268 Measurement and conversion https://www.khanacademy.org/math/7th-grade-math-eureka-squared-aligned/x314834f71a55c568:geometry/x314834f71a55c568:volume-of-prisms/v/volume-of-rectangular-pyramid-part-1-cube 2024-11-05T21:45:04.933889973Z Volume of rectangular pyramids using cubes Explore why the formula for the volume of rectangular pyramids has a 1/3 in it! We'll start by investigating with a cube. Kate Garfinkel video https://cdn.kastatic.org/ka_thumbnails_cache/be26c622-ce16-49a8-9d20-15ce3ad42e11_1280_720_base.png Volume of rectangular pyramids using cubes Explore why the formula for the volume of rectangular pyramids has a 1/3 in it! We'll start by investigating with a cube. https://cdn.kastatic.org/ka-youtube-converted/tDNCy8dalPY.mp4/tDNCy8dalPY.mp4 91 Measurement and conversion https://www.khanacademy.org/math/geometry/hs-geo-solids/xff63fac4:hs-geo-cavalieri-s-principle/v/volume-of-pyramids-intuition 2022-09-10T02:03:40.164764806Z Volume of pyramids intuition The volume of a pyramid is a fraction of the volume of the rectangular prism that encloses it. We can find out what that fraction is by cutting a prism into several pyramids. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/54086373-166b-4254-af88-47d3cb8c8dd9_1280_720_base.png Volume of pyramids intuition The volume of a pyramid is a fraction of the volume of the rectangular prism that encloses it. We can find out what that fraction is by cutting a prism into several pyramids. https://cdn.kastatic.org/ka-youtube-converted/fD52yzLF8DA.mp4/fD52yzLF8DA.mp4 509 Measurement and conversion https://www.khanacademy.org/math/geometry/hs-geo-solids/xff63fac4:hs-geo-cavalieri-s-principle/a/volume-of-a-pyramid-or-cone 2022-10-27T00:15:07.305964705Z Volume of a pyramid or cone Where does the 1/3 come from in the formula for the volume of a pyramid? How does the volume of a cone relate? What about oblique pyramids (pyramids that lean to the side)? article https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-volume/e/volumes-of-cones--cylinders--and-spheres 2026-03-06T16:40:44.65135105Z Volume of cylinders Practice applying the volume formulas for cylinders. Ben exercise https://www.khanacademy.org/math/geometry/hs-geo-solids/hs-geo-solids-intro/v/volume-cone-example 2021-06-30T20:49:35Z Volume of a cone The formula for the volume of a cone is V=1/3hπr². Learn how to use this formula to solve an example problem. Sal Khan video https://cdn.kastatic.org/googleusercontent/5HTszugCGKSPYwLkYD5vkLGIBKMkvvsFspSgzjQfu9xQzkPsfg7qj70ve8cA41Qq-YVCtUag-eeRvwFTygs9dei8 Volume of a cone The formula for the volume of a cone is V=1/3hπr². Learn how to use this formula to solve an example problem. https://cdn.kastatic.org/ka-youtube-converted/hC6zx9WAiC4.mp4/hC6zx9WAiC4.mp4 344 Measurement and conversion https://www.khanacademy.org/math/geometry/hs-geo-solids/xff63fac4:hs-geo-cavalieri-s-principle/v/volumes-of-cones-intuition 2022-09-10T02:03:40.164764806Z Volumes of cones intuition Use Cavalieri's Principle to establish that the formula for the volume of a cone is the same as the formula for the volume of a pyramid (1/3 * base area * height). Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/d4449373-474c-49d7-9c95-f6f5c9ea9b96_1280_720_base.png Volumes of cones intuition Use Cavalieri's Principle to establish that the formula for the volume of a cone is the same as the formula for the volume of a pyramid (1/3 * base area * height). https://cdn.kastatic.org/ka-youtube-converted/LmBViMOeYXg.mp4/LmBViMOeYXg.mp4 342 Measurement and conversion https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:right-circular-cone/v/computing-volume-of-a-cone 2024-01-17T10:08:31.452096345Z Computing Volume of a cone Finding volume of a cone with an example. Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Computing Volume of a cone Finding volume of a cone with an example. https://cdn.kastatic.org/ka-youtube-converted/vrCBP9kXKmE.mp4/vrCBP9kXKmE.mp4 158 Measurement and conversion https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-volume/e/volume-of-cones 2026-03-10T04:30:37.966653692Z Volume of cones Practice applying the volume formulas for cones. Lindsay exercise https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/cell-size/v/volume-of-a-sphere 2024-08-12T04:59:05.728972119Z Volume of a sphere The formula for the volume of a sphere is V = 4/3 π r³, where V = volume and r = radius. The radius of a sphere is half its diameter. So, to calculate the volume of a sphere given the diameter of the sphere, you can first calculate the radius, then the volume. Sal Khan video https://cdn.kastatic.org/googleusercontent/8AeYNKMuEIMk1e6LaaGdfymsyGimFhyoSbA6F9n0bw-GEDknjy0sr9DAwnh4fUCqLCJLqs62D4GiZ4CJWix663XW-A Volume of a sphere The formula for the volume of a sphere is V = 4/3 π r³, where V = volume and r = radius. The radius of a sphere is half its diameter. So, to calculate the volume of a sphere given the diameter of the sphere, you can first calculate the radius, then the volume. https://cdn.kastatic.org/ka-youtube-converted/IelS2vg7JO8.mp4/IelS2vg7JO8.mp4 155 Measurement and conversion https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-volume/e/volume-of-spheres 2025-03-03T19:47:54.930712342Z Volume of spheres Practice applying the volume formulas for spheres. Lindsay exercise https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-volume/e/volume-of-cylinders--spheres--and-cones-word-problems 2025-11-22T10:30:57.616480509Z Volume of cylinders, spheres, and cones word problems Solve word problems involving volume of cylinders, spheres, and cones. Lindsay exercise https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/v/scaled-drawings-worked-examples 2022-10-06T11:16:59.256015857Z Scale drawings Sal finds a missing side length in a scale drawing when given either a set of corresponding side lengths or one side length and the scale factor. video https://cdn.kastatic.org/googleusercontent/H5mtpElJiVmi6uzdnX5j-_PEZPUEYjlJoZBtzAgakZWCo03cDj9dzF2mUgg0Q2SB4lqcND58PwdZ0MBjD3uU63FG Scale drawings Sal finds a missing side length in a scale drawing when given either a set of corresponding side lengths or one side length and the scale factor. https://cdn.kastatic.org/ka-youtube-converted/XUOPGqKGbjk.mp4/XUOPGqKGbjk.mp4 213 Measurement and conversion https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/v/ratio-word-problem-exercise-example-2 2020-10-30T14:35:44Z Scale drawing: centimeters to kilometers Sal uses ratios to figure out how far apart two cities should be on a map. Sal Khan video https://cdn.kastatic.org/googleusercontent/ZxNJBuotg6AMF6-04StG2nimHFANmC8748wNAwMPh3u_wu9Snxzft2Onim04BeS8D39Ow75W0e50WSftRm30Smw Scale drawing: centimeters to kilometers Sal uses ratios to figure out how far apart two cities should be on a map. https://cdn.kastatic.org/ka-youtube-converted/tOd2T72eJME.mp4/tOd2T72eJME.mp4 72 Measurement and conversion https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/e/interpreting-scale-drawings 2026-05-04T16:10:46.51963925Z Scale drawings Find a missing side length in a scale drawing when given either a set of corresponding side lengths or one side length and the scale factor. jenoverholt exercise https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/v/scale-drawings-example 2021-06-30T20:49:37Z Interpreting a scale drawing Understand how a scale drawing is converted into real numbers using the scale factor. Sal Khan video https://cdn.kastatic.org/googleusercontent/FlyxFKSOIIux90_hbjQg0hlh9sN7PApimz3dmv1fLpkUcSufyDF2TYOl7hP4YwUxQNSjeN6lhTC8G-H2fq6OT_Rs Interpreting a scale drawing Understand how a scale drawing is converted into real numbers using the scale factor. https://cdn.kastatic.org/ka-youtube-converted/byjmR7JBXKc.mp4/byjmR7JBXKc.mp4 266 Measurement and conversion https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/a/scale-drawing-word-problems 2025-04-16T16:44:07.80049Z Scale drawing word problems Use scale drawings to solve problems in real-world contexts.   article https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/v/creating-scale-drawings 2022-10-06T11:16:59.256015857Z Creating scale drawings Sal uses real world contexts to create scale drawings on a grid. video https://cdn.kastatic.org/googleusercontent/AEqzOoB_7hLhTTiTqAtHxIpITGtEJLubf4XODeL221WbfCLGen0R4S29cSqDdbGBSmCWV2nqLi0zgEhEjT1svY0y Creating scale drawings Sal uses real world contexts to create scale drawings on a grid. https://cdn.kastatic.org/ka-youtube-converted/TASA6V5fGT8.mp4/TASA6V5fGT8.mp4 138 Measurement and conversion https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/v/constructing-scale-drawings 2021-06-30T20:49:37Z Making a scale drawing An urban planner needs your help in creating a scale drawing. Let's use our knowledge about scale factor, length, and area to assist. Sal Khan video https://cdn.kastatic.org/googleusercontent/zQpSHGoIiu7xQTv2oAv66vHecbS2yx1X0PM9rTJxIwGXA02e6D9wZJtSEB_UvIfuDnqjkYWGOiewBvoT3DTf01KP Making a scale drawing An urban planner needs your help in creating a scale drawing. Let's use our knowledge about scale factor, length, and area to assist. https://cdn.kastatic.org/ka-youtube-converted/f-gCYOCFMYc.mp4/f-gCYOCFMYc.mp4 198 Measurement and conversion https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/e/constructing-scale-drawings 2024-09-05T20:39:26.312313729Z Construct scale drawings An urban planner needs your help in creating a scale drawing. Let's use our knowledge about scale factor, length, and area to assist. Emily.Hanlon exercise https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/v/scale-factors-and-area 2022-10-06T11:16:59.256015857Z Scale factors and area Sal explore how scale factor affects the area of a scaled figure. video https://cdn.kastatic.org/googleusercontent/4Z5I3bwraipywrBBklLVas4eUV6u4yYScHpoeikquLFy8NEwdCc0JS7wtmUPYm19gAE3gYFfHCfvCPX8rpyx1pT7 Scale factors and area Sal explore how scale factor affects the area of a scaled figure. https://cdn.kastatic.org/ka-youtube-converted/h-qwno7n5F4.mp4/h-qwno7n5F4.mp4 364 Measurement and conversion https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/v/scale-drawing-example-2 2020-09-16T18:09:48Z Solving a scale drawing word problem See how we solve a word problem by using a scale drawing and finding the scale factor. Sal Khan video https://cdn.kastatic.org/googleusercontent/H0DmK0fKFk7UjN3oOPfWCZWe840k2st_vtR4Lr6R-HBcJFoh-goM7LJ5c6dTkWggkbSi9bl7dDmsY7YydJ_eaPtf Solving a scale drawing word problem See how we solve a word problem by using a scale drawing and finding the scale factor. https://cdn.kastatic.org/ka-youtube-converted/EgOyJJxuuP8.mp4/EgOyJJxuuP8.mp4 351 Measurement and conversion https://www.khanacademy.org/math/cc-seventh-grade-math/x6b17ba59:scale-drawings/cc-7th-scale-drawings/e/relate-scale-drawings-to-area 2026-03-26T21:40:53.527314638Z Relate scale drawings to area Understand how creating a scale copy of a figure affects the area of the figure. Lindsay exercise https://www.khanacademy.org/economics-finance-domain/ap-macroeconomics/ap-open-economy-international-trade-and-finance/exchange-rates/v/exchange-rate-primer-ap-macroeconomics-khan-academy 2022-09-29T00:24:54.291335517Z Exchange rate primer Learn about what an exchange rate is and how to determine the cost of goods in another currency. video https://cdn.kastatic.org/googleusercontent/oVUHqnVNCzMQVdARjJ9LKuQ32ibWU-S-alLseitXuQMQRyvsd2rBYrw16z-VLWhQ_C1cZ4qCfK0msUHZetwGge8 Exchange rate primer Learn about what an exchange rate is and how to determine the cost of goods in another currency. https://cdn.kastatic.org/ka-youtube-converted/-5x6j_P1OSI.mp4/-5x6j_P1OSI.mp4 446 Measurement and conversion https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-money-word-problems/v/currency-conversion-example 2021-05-07T00:21:33Z Currency conversion word problem Sal converts between American dollars and Chinese yuan. Sal Khan video https://cdn.kastatic.org/googleusercontent/wbe8Gu2TisJhj2JJ0OL2wDQ7PyUL-qB-4aoHG_f73fH2qBsdhQ2vcseOBwYXDPC1tH1cMvvvBDSMVNMSrgzqfEtbew Currency conversion word problem Sal converts between American dollars and Chinese yuan. https://cdn.kastatic.org/ka-youtube-converted/XcRX-mkjeiM.mp4/XcRX-mkjeiM.mp4 54 Measurement and conversion https://www.khanacademy.org/economics-finance-domain/ap-macroeconomics/ap-open-economy-international-trade-and-finance/exchange-rates/a/lesson-summary-exchange-rates 2021-04-29T07:57:42Z Lesson Summary: Exchange rates In this lesson summary review and remind yourself of the key terms and calculations related to exchange rates. article https://www.khanacademy.org/economics-finance-domain/ap-macroeconomics/ap-open-economy-international-trade-and-finance/exchange-rates/e/exchange-rates 2024-11-15T01:48:10.275827772Z Exchange rates Practice what you know about exchange rates in this exercise. melanie exercise https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-converting-units-of-time/v/time-unit-conversion 2021-05-07T00:21:38Z Converting units of time Learn to convert hours, minutes, and seconds. Sal Khan video https://cdn.kastatic.org/googleusercontent/SG9lieNJteIXkRRxeSVqH6_QG0xGLmgauFn56idkxtalhSaCWvwkuzuRPLpA_SFNadQSguhQjq8eu6HGCg3fWUfw Converting units of time Learn to convert hours, minutes, and seconds. https://cdn.kastatic.org/ka-youtube-converted/-r7JwuSdj5M.mp4/-r7JwuSdj5M.mp4 202 Measurement and conversion https://www.khanacademy.org/math/cc-third-grade-math/time/elapsed-time/v/time-to-leave-for-home 2021-07-15T19:05:23Z Time word problem: travel time Sal solves what time do you leave if you are traveling 39 minutes and need to be home at 6:15. Sal Khan video https://cdn.kastatic.org/googleusercontent/J31qJtEBhQy6uzHuJ9FBN5TYt9gTXsWw31UR6YkTqrH0-mgQ49UqRMLJzecBJvhLm_RDk3WAfiQcM0l7pRg9jTW2 Time word problem: travel time Sal solves what time do you leave if you are traveling 39 minutes and need to be home at 6:15. https://cdn.kastatic.org/ka-youtube-converted/kul2ZmVIQZk.mp4/kul2ZmVIQZk.mp4 249 Measurement and conversion https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-converting-units-of-time/v/time-word-problem 2023-07-24T13:48:13.07161686Z Time word problem: Susan's break Dive into the concept of converting units of time, specifically minutes into hours. Understand the importance the relationship between these units and demonstrates how to apply this knowledge to solve real-world problems involving time intervals. Sal Khan video https://cdn.kastatic.org/googleusercontent/DIz-3TvzTw0rO4mJl0LFhzSAhFAC_cUIm5VggGQ2FaL66I8LzB73zzG-WMCLd1Ix0sGl8Bxxkvgeu9dhb9yo_v-l Time word problem: Susan's break Dive into the concept of converting units of time, specifically minutes into hours. Understand the importance the relationship between these units and demonstrates how to apply this knowledge to solve real-world problems involving time intervals. https://cdn.kastatic.org/ka-youtube-converted/UhMM68fq9FA.mp4/UhMM68fq9FA.mp4 218 Measurement and conversion https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-converting-units-of-time/a/converting-units-of-time-review 2021-05-07T00:21:38Z Converting units of time review (seconds, minutes, & hours) Review the size of seconds, minutes, and hours and how to convert between them.  Then, try some practice problems. article https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-converting-units-of-time/e/measuring-time-word-problems 2026-04-08T01:15:04.085520103Z Time conversion word problems Solve word problems to find what time an event occurred or how long an event lasted. Lori Hodges exercise https://www.khanacademy.org/math/cc-fourth-grade-math/imp-measurement-and-data-2/imp-converting-units-of-time/e/measurement-units 2026-04-08T00:36:09.500768563Z Convert to smaller units (sec, min, & hr) Practice converting a measure of time to a smaller unit.   Lindsay exercise https://www.khanacademy.org/math/8th-engage-ny/engage-8th-module-4/8th-module-4-topic-d/v/converting-farenheit-to-celsius 2024-07-15T16:52:25.191839862Z Converting Fahrenheit to Celsius To convert from Celsius to Fahrenheit, we can use the formula F = 9/5C + 32, where C is the temperature in degrees Celsius and F is the temperature in degrees Fahrenheit. To convert from Fahrenheit to Celsius we can use the formula C = 5/9(F - 32). Sal Khan video https://cdn.kastatic.org/googleusercontent/BMRIGIyyNVCpvF1VWhCCIb6F8kPGR8nbJLEEIMrbcwHVhn-hzPZJ2c-aIdPU0ppcYIco4Vcwx-5a5lUyui8dD7X6 Converting Fahrenheit to Celsius To convert from Celsius to Fahrenheit, we can use the formula F = 9/5C + 32, where C is the temperature in degrees Celsius and F is the temperature in degrees Fahrenheit. To convert from Fahrenheit to Celsius we can use the formula C = 5/9(F - 32). https://cdn.kastatic.org/ka-youtube-converted/NqbkvEK46xM.mp4/NqbkvEK46xM.mp4 178 Measurement and conversion https://www.khanacademy.org/math/8th-engage-ny/engage-8th-module-4/8th-module-4-topic-d/v/comparing-celsius-and-farenheit-temperature-scales 2020-06-23T07:22:42Z Comparing Celsius and Fahrenheit temperature scales Comparing Celsius and Fahrenheit temperature scales Sal Khan video https://cdn.kastatic.org/googleusercontent/e0tDTCwe_K0NdYxs6G5D5RN-92hlvcv2Lz4EqSViYG32cnie2dmg_P6uyM2KZoVSqunjzIznMU10RtyUJ6Z0AFKl Comparing Celsius and Fahrenheit temperature scales Comparing Celsius and Fahrenheit temperature scales https://cdn.kastatic.org/ka-youtube-converted/aASUZqJCHHA.mp4/aASUZqJCHHA.mp4 170 Measurement and conversion https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:thermal-properties-of-matter/x0e04e0cb682fb793:tmperature/v/absolute-temperature-and-the-kelvin-scale 2023-09-10T17:11:17.624018169Z Absolute temperature and the kelvin scale This video explains temperature as a measure of average kinetic energy in a system. It highlights the Kelvin, Celsius, and Fahrenheit scales, detailing their differences, conversion methods, and applications. The concept of absolute zero, the coldest possible temperature, is also introduced. Ryan Scott Patton video https://cdn.kastatic.org/googleusercontent/B8pBW6w5MZqqv2RTGhLYtqNNps1HRnnDugpOzXDX_qMRyWonD5d41Ey2DOISAGMJIWqIXIVUs-ZD39-wXLl6kaY Absolute temperature and the kelvin scale This video explains temperature as a measure of average kinetic energy in a system. It highlights the Kelvin, Celsius, and Fahrenheit scales, detailing their differences, conversion methods, and applications. The concept of absolute zero, the coldest possible temperature, is also introduced. https://cdn.kastatic.org/ka-youtube-converted/eEJqaNaq9v8.mp4/eEJqaNaq9v8.mp4 614 Measurement and conversion https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:modeling/x2ec2f6f830c9fb89:manipulating-formulas/v/solving-for-a-variable-2 2021-06-30T18:10:05Z Manipulating formulas: temperature Sal takes the formula for converting from Fahrenheit temperature to Celsius, and solves it for F so it serves to convert from Celsius to Fahrenheit. Sal Khan video https://cdn.kastatic.org/googleusercontent/SHRO-zfXpAhYG7nntQGM0Fkbsjm1zrKHZPGS8q7tFL_SAwULEMdbHroU3ok8HpzYtTUAc9sWbpmPIycHOSG3H4zw9w Manipulating formulas: temperature Sal takes the formula for converting from Fahrenheit temperature to Celsius, and solves it for F so it serves to convert from Celsius to Fahrenheit. https://cdn.kastatic.org/ka-youtube-converted/BR5yFOt0zao.mp4/BR5yFOt0zao.mp4 161 Measurement and conversion https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:thermal-properties-of-matter/x0e04e0cb682fb793:tmperature/e/measuring-temperature 2025-05-18T06:30:48.900720574Z Measuring temperature Let's solve a few questions on measuring temperature in this exercise. Revathi exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:thermal-properties-of-matter/x0e04e0cb682fb793:tmperature/e/measurement-of-heat-and-temperature 2026-04-29T10:50:35.589391704Z Measurement of heat and temperature Let's solve some questions on measurement of heat and temperature Vibhor Pandey exercise