https://www.khanacademy.org/math/5th-grade-math-eureka-squared-aligned/xaf06646de8e27a4f:addition-and-multiplication-with-area-and-volume/xaf06646de8e27a4f:identify-attributes-and-properties-of-right-rectangular-prisms/v/recognizing-common-3d-shapes-indian-accent 2025-06-05T06:01:43.515132284Z 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! Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw 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/pGBfHtUtpmc.mp4/pGBfHtUtpmc.mp4 177 Visualising 3-D in 2-D https://www.khanacademy.org/math/ka-math-class-7/x26f4f4b84655c15c:visualising-solid-shapes-new-ncert/x26f4f4b84655c15c:drawing-solids-on-a-flat-surface/v/top-front-and-side-view-of-the-object 2025-06-03T11:09:18.099580406Z Top, front and side view of the object In this video, we explore how to accurately sketch the top, side, and front views of objects using three essential methods: Looking from Different Angles: Understand how to observe objects from various perspectives to create detailed and proportionate views. Shadowing: Learn to use light and shadow to visualize and draw the object's dimensions effectively. Slicing: Discover how breaking an object into slices helps you analyze its structure and represent it in separate views. Follow along as we provide clear instructions and practical demonstrations to make the process easy and fun. Mahak Wasan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Top, front and side view of the object In this video, we explore how to accurately sketch the top, side, and front views of objects using three essential methods: Looking from Different Angles: Understand how to observe objects from various perspectives to create detailed and proportionate views. Shadowing: Learn to use light and shadow to visualize and draw the object's dimensions effectively. Slicing: Discover how breaking an object into slices helps you analyze its structure and represent it in separate views. Follow along as we provide clear instructions and practical demonstrations to make the process easy and fun. https://cdn.kastatic.org/ka-youtube-converted/knybOo9pdwg.mp4/knybOo9pdwg.mp4 408 Visualising 3-D in 2-D https://www.khanacademy.org/math/ka-math-class-7/x26f4f4b84655c15c:visualising-solid-shapes-new-ncert/x26f4f4b84655c15c:drawing-solids-on-a-flat-surface/v/sketching-of-solids-on-flat-surface 2025-06-03T11:09:18.099580406Z Sketching of solids on flat surface This video is your ultimate guide to sketching 3D solids on flat surface. We’ll break down two essential techniques—oblique and isometric sketching—into simple, easy-to-follow steps. Watch as we demonstrate how to draw each type, explaining the differences and providing tips to make your sketches accurate and visually appealing. Mahak Wasan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Sketching of solids on flat surface This video is your ultimate guide to sketching 3D solids on flat surface. We’ll break down two essential techniques—oblique and isometric sketching—into simple, easy-to-follow steps. Watch as we demonstrate how to draw each type, explaining the differences and providing tips to make your sketches accurate and visually appealing. https://cdn.kastatic.org/ka-youtube-converted/20LM_tXZInU.mp4/20LM_tXZInU.mp4 486 Visualising 3-D in 2-D 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 Visualising 3-D in 2-D https://www.khanacademy.org/math/revision-tg-math-class-8/x9ce0e841a99d4a8a:week-3/x9ce0e841a99d4a8a:visualising-3-d-in-2-d/v/euler-s-formula-geometry-v-f-e-2 2025-10-27T11:00:46.958143659Z Euler's Formula (Geometry) [V+F-E=2] In this video, we explore Euler's Formula—a beautiful relationship in geometry that connects the number of faces, edges, and vertices in polyhedrons. You'll learn what each term means (face, edge, vertex) with clear visual examples, and see how the formula V − E + F = 2 holds true across different 3D shapes. We walk through multiple examples, from cubes to pyramids, to help you understand and apply the formula confidently. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction to faces, edges and vertices 01:00 Euler's formula 01:40 Verifying Euler's formula using examples 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 Khan Academy Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Euler's Formula (Geometry) [V+F-E=2] In this video, we explore Euler's Formula—a beautiful relationship in geometry that connects the number of faces, edges, and vertices in polyhedrons. You'll learn what each term means (face, edge, vertex) with clear visual examples, and see how the formula V − E + F = 2 holds true across different 3D shapes. We walk through multiple examples, from cubes to pyramids, to help you understand and apply the formula confidently. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction to faces, edges and vertices 01:00 Euler's formula 01:40 Verifying Euler's formula using examples 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 Khan Academy https://cdn.kastatic.org/ka-youtube-converted/LiHbNecbtpY.mp4/LiHbNecbtpY.mp4 417 Visualising 3-D in 2-D https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-geometry-topic/x0267d782:cc-6th-nets-of-3d-figures/v/nets-of-polyhedra 2021-06-30T20:49:36Z Intro to nets of polyhedra Admittedly, "nets of polyhedra" sounds like the title of a bad sci-fi movie about man-eating, multi-headed fish. But in reality, nets of polyhedra are just 2D objects that wrap around 3D objects, like wrapping paper around presents. Sal Khan video https://cdn.kastatic.org/googleusercontent/Y37mID-JZzxDjs9nLIGVxHcULrvN-cPKP5AOM7ttIqnBJu8lHa-4qHJt_S0RYN7f2Pks_5Zm1JSVk6l4ZN6FILU Intro to nets of polyhedra Admittedly, "nets of polyhedra" sounds like the title of a bad sci-fi movie about man-eating, multi-headed fish. But in reality, nets of polyhedra are just 2D objects that wrap around 3D objects, like wrapping paper around presents. https://cdn.kastatic.org/ka-youtube-converted/ZACf9EecFrY.mp4/ZACf9EecFrY.mp4 408 Visualising 3-D in 2-D https://www.khanacademy.org/math/revision-tg-math-class-8/x9ce0e841a99d4a8a:week-3/x9ce0e841a99d4a8a:visualising-3-d-in-2-d/e/revision-visualising-3-d-in-2-d-tg-class-8 2026-03-28T05:22:52.02396831Z Revision visualising 3-D in 2-D TG class 8 . Khan Academy exercise