https://www.khanacademy.org/math/revision-term-1-mh-math-class-8/x0c43044bb5624863:week-2/x0c43044bb5624863:altitudes-and-median-of-triangles/v/what-are-altitudes-of-triangle 2024-05-28T09:47:20.658952794Z What are altitudes of triangle In this video we discuss what is an altitude of a triangle and how we can draw/identitfy different altitudes of the triangle Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw What are altitudes of triangle In this video we discuss what is an altitude of a triangle and how we can draw/identitfy different altitudes of the triangle https://cdn.kastatic.org/ka-youtube-converted/X2v5aCK5ZoI.mp4/X2v5aCK5ZoI.mp4 206 Geometric Shapes on Plane Surfaces https://www.khanacademy.org/districts-courses/geometry-scps-pilot-textbook/x398e4b4a0a333d18:properties-and-attributes-of-triangles/x398e4b4a0a333d18:medians-and-altitudes-of-triangles/v/intro-to-medians-of-a-triangle-class-7-india-math-khan-academy 2021-07-02T09:35:35Z Intro to medians of a triangle Let's get introduced to medians of a triangle and learn what centroids are. Aanand Srinivas video https://cdn.kastatic.org/googleusercontent/t7OPUsgVEIuYj41K54WrfklJHYd53UanJSJy1-buyZqs7XSIOtz2ZajmyOuocKoTtELjjxKf0bqFxqSomwA-11ZNuA Intro to medians of a triangle Let's get introduced to medians of a triangle and learn what centroids are. https://cdn.kastatic.org/ka-youtube-converted/cr92Xwb4CoA.mp4/cr92Xwb4CoA.mp4 328 Geometric Shapes on Plane Surfaces https://www.khanacademy.org/districts-courses/geometry-scps-pilot-textbook/x398e4b4a0a333d18:properties-and-attributes-of-triangles/x398e4b4a0a333d18:medians-and-altitudes-of-triangles/e/identify-median-and-altitude 2026-04-08T01:15:04.085520103Z Identify medians and altitudes Practice identifying medians and altitudes in triangles. Ashish exercise https://www.khanacademy.org/math/cc-fifth-grade-math/properties-of-shapes/imp-quadrilaterals-2/v/quadrilateral-overview 2022-11-16T04:22:43.7414897Z Intro to quadrilateral There are many different types of quadrilaterals. A quadrilateral is defined as a two-dimensional shape with four sides, four vertices, and four angles. There are two main types: concave and convex. There are also various subcategories of convex quadrilaterals, such as trapezoids, parallelograms, rectangles, rhombi, and squares. Sal Khan video https://cdn.kastatic.org/googleusercontent/y0z2Dx227KWvT4VD_hG_TqpMYbxEXxdTPRSOKVc6aeWVt99HQzi2PyCHYK-EJWubSGHfH7rO_qaoBpweufvY7mrJ Intro to quadrilateral There are many different types of quadrilaterals. A quadrilateral is defined as a two-dimensional shape with four sides, four vertices, and four angles. There are two main types: concave and convex. There are also various subcategories of convex quadrilaterals, such as trapezoids, parallelograms, rectangles, rhombi, and squares. https://cdn.kastatic.org/ka-youtube-converted/Ka82QC4QvGA.mp4/Ka82QC4QvGA.mp4 504 Geometric Shapes on Plane Surfaces https://www.khanacademy.org/math/class-6-od/xc64d76c04ac22b26:geometric-shapes-on-plane-surfaces-odia/xc64d76c04ac22b26:quadrilaterals-odia-class-6/v/components-of-quadrilaterals 2025-07-22T09:54:48.320853749Z Components of quadrilaterals In this video, we’ll explore all the key concepts of quadrilaterals — from adjacent and opposite angles to consecutive and opposite vertices, sides, and diagonals. With clear visuals and in-depth examples, you’ll get a clear understanding of each property and how they all come together in different types of quadrilaterals. Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Components of quadrilaterals In this video, we’ll explore all the key concepts of quadrilaterals — from adjacent and opposite angles to consecutive and opposite vertices, sides, and diagonals. With clear visuals and in-depth examples, you’ll get a clear understanding of each property and how they all come together in different types of quadrilaterals. https://cdn.kastatic.org/ka-youtube-converted/HMnDH9ca0Jw.mp4/HMnDH9ca0Jw.mp4 784 Geometric Shapes on Plane Surfaces https://www.khanacademy.org/math/cc-third-grade-math/quadrilaterals-3rd/imp-quadrilaterals/e/identify-quadrilaterals 2025-01-03T18:38:20.998556364Z Identify quadrilaterals Identify squares, rectangles, and rhombuses. Lindsay exercise https://www.khanacademy.org/math/cc-fourth-grade-math/plane-figures/imp-classifying-geometric-shapes/v/quadrilateral-properties 2021-06-30T20:49:37Z Quadrilateral properties Learn about the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares. Sal Khan video https://cdn.kastatic.org/googleusercontent/JGC4e5CKmDPc0EaGsoC76iS72j_U_G4PY5Pqha8QYVqeze74OxRmhuICMKdpz8HS_llastP2FKeGE1eDazyEHLI Quadrilateral properties Learn about the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares. https://cdn.kastatic.org/ka-youtube-converted/5CeBlu260Rw.mp4/5CeBlu260Rw.mp4 307 Geometric Shapes on Plane Surfaces https://www.khanacademy.org/math/cc-third-grade-math/quadrilaterals-3rd/imp-quadrilaterals/e/categorize-quadrilaterals 2025-02-27T11:46:16.621461116Z Analyze quadrilaterals Classify and compare rectangles, rhombuses, and squares. Erin Kats exercise https://www.khanacademy.org/math/cc-fifth-grade-math/properties-of-shapes/imp-quadrilaterals-2/e/quadrilateral_types 2025-02-27T11:46:16.621461116Z Quadrilateral types Identify quadrilaterals based on pictures or attributes. Quadrilaterals included are parallelograms, rhombuses, rectangles, and squares. Christopher Wobbles Seymour exercise https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:properties-of-parallelograms/e/quadrilaterals-10-c 2025-09-03T07:00:55.934529618Z Properties of parallelogram Quadrilaterals ashish exercise https://www.khanacademy.org/math/grade-8-math-snc-aligned/x4383bdbca3d6abf7:geometry/x4383bdbca3d6abf7:construction-of-quadilaterals/e/quadrilaterals-10-d 2026-04-07T22:59:30.107127435Z Properties of quadrilaterals Quadrilaterals ashish exercise https://www.khanacademy.org/math/class-6-od/xc64d76c04ac22b26:geometric-shapes-on-plane-surfaces-odia/xc64d76c04ac22b26:quadrilaterals-odia-class-6/e/angle-properties-of-quadrilaterals 2025-05-22T15:16:12.691169048Z Angle properties of quadrilaterals Angle properties of quadrilaterals Ashish Gupta exercise https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-circle-basics/v/language-and-notation-of-the-circle 2021-02-16T16:08:13Z Circles glossary Formal definition of a circle. Tangent and secant lines. Diameters and radii. major and minor arcs Sal Khan video https://cdn.kastatic.org/googleusercontent/SWae14xdpXW141daSvXpqUJZzzdAUuYNQ8-Zz-oWkTnYjVHewnV66scU53oFOzvcpEBnymxptuVTkmroZudMhhyh Circles glossary Formal definition of a circle. Tangent and secant lines. Diameters and radii. major and minor arcs https://cdn.kastatic.org/ka-youtube-converted/U2W7HPyC0cM.mp4/U2W7HPyC0cM.mp4 672 Geometric Shapes on Plane Surfaces https://www.khanacademy.org/math/revision-tg-math-class-9/x6c9499d6e7016acd:week-3/x6c9499d6e7016acd:circles/v/basic-terms-related-to-circles 2026-02-22T07:10:45.705716181Z Basic Terms related to Circles What do dosas, rotis, and pizzas have in common? They're all circles! 🍕 This video uses delicious examples to introduce you to the fundamental parts of a circle. We'll explore the center, radius, diameter, chords, arcs, and sectors in a simple and visual way. Perfect for anyone starting their journey into geometry! Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Basic Terms related to Circles What do dosas, rotis, and pizzas have in common? They're all circles! 🍕 This video uses delicious examples to introduce you to the fundamental parts of a circle. We'll explore the center, radius, diameter, chords, arcs, and sectors in a simple and visual way. Perfect for anyone starting their journey into geometry! https://cdn.kastatic.org/ka-youtube-converted/BALZW-dY-fc.mp4/BALZW-dY-fc.mp4 350 Geometric Shapes on Plane Surfaces https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:circles/x06d55bfa213a79fd:untitled-272/e/vocab-around-a-circle-6th 2026-04-08T00:16:02.937952483Z Circle vocabulary Vocab around a circle supriya exercise https://www.khanacademy.org/math/revision-term-1-tg-math-lass-6/x0ef789b44aba665e:week-3/x0ef789b44aba665e:basic-geometrical-ideas/e/circle-14-b 2026-04-07T22:23:57.656416987Z Parts of a circle - II Circle ashish exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/geometric-solids/v/recognizing-common-3d-shapes 2023-09-15T04:55:18.07520004Z Recognizing common 3D shapes Learn about 3D shapes! A square pyramid has a square base. A rectangular prism is a box shape with all rectangular sides. A triangular prism has triangle faces on opposite sides. A sphere is like a globe. A cylinder looks like a can with circular faces on top and bottom. Shapes are fun! video https://cdn.kastatic.org/ka_thumbnails_cache/269d8dc9-c41f-45fa-9752-bac89194cc97_1280_720_base.png Recognizing common 3D shapes Learn about 3D shapes! A square pyramid has a square base. A rectangular prism is a box shape with all rectangular sides. A triangular prism has triangle faces on opposite sides. A sphere is like a globe. A cylinder looks like a can with circular faces on top and bottom. Shapes are fun! https://cdn.kastatic.org/ka-youtube-converted/tqxQSSzuXX0.mp4/tqxQSSzuXX0.mp4 209 Geometric Shapes on Plane Surfaces https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/geometric-solids/e/identify-geometric-solids--3d-figures- 2025-04-16T14:25:03.578489663Z Identify geometric solids (3D shapes) Identify prisms, pyramids, cylinders, cones, and spheres. Lindsay exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/geometric-solids/v/counting-faces-and-edges-of-3d-shapes 2023-09-15T04:55:18.07520004Z Counting faces and edges of 3D shapes Learn about shapes! Discover how to count faces and edges on 3D figures. We explore a transparent shape with five faces and another shape, a square pyramid, with eight edges and five faces. It's a colorful journey into geometry! video https://cdn.kastatic.org/ka_thumbnails_cache/77a3d873-7311-4e5d-a95a-b315abb25791_1280_720_base.png Counting faces and edges of 3D shapes Learn about shapes! Discover how to count faces and edges on 3D figures. We explore a transparent shape with five faces and another shape, a square pyramid, with eight edges and five faces. It's a colorful journey into geometry! https://cdn.kastatic.org/ka-youtube-converted/_y17uHBwa_8.mp4/_y17uHBwa_8.mp4 227 Geometric Shapes on Plane Surfaces https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/geometric-solids/e/identify-parts-of-3d-shapes 2025-05-22T15:16:12.691169048Z Identify parts of 3D shapes Identify faces, bases, edges, and vertices on 3D shapes. Lindsay exercise