https://www.khanacademy.org/math/class-10-tg/x6d741825a19c63c4:similar-triangles/x6d741825a19c63c4:introduction-to-similar-figures/v/similar-figures 2025-10-06T14:00:44.591197305Z Similar Figures In this video, we explore the concept of similar figures—what it means for shapes to have the same form but different sizes, and how this differs from congruency, where both shape and size match exactly. You'll learn what we mean by ""same shape,"" the key conditions for similarity (like AA, SSS, and SAS), and how to identify similar figures in geometric problems. We also dive into real-world applications of similarity and see where and how do we use similarity. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Congruency vs Similarity 01:16 What does same shape mean? 03:16 Conditions for Similarity 05:27 Where and how do we use Similarity? 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 Similar Figures In this video, we explore the concept of similar figures—what it means for shapes to have the same form but different sizes, and how this differs from congruency, where both shape and size match exactly. You'll learn what we mean by ""same shape,"" the key conditions for similarity (like AA, SSS, and SAS), and how to identify similar figures in geometric problems. We also dive into real-world applications of similarity and see where and how do we use similarity. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Congruency vs Similarity 01:16 What does same shape mean? 03:16 Conditions for Similarity 05:27 Where and how do we use Similarity? 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/FPKIueFZxxQ.mp4/FPKIueFZxxQ.mp4 391 Exploring geometric figures https://www.khanacademy.org/math/7th-grade-math-eureka-squared-aligned/x314834f71a55c568:ratios-and-proportionality/x314834f71a55c568:scale-drawings/v/relating-side-lengths-in-similar-figures 2024-04-15T16:13:38.056974962Z Relating side lengths in similar figures Given a pair of similar figures, write proportion statements that relate a side with an unknown length to known side lengths, using both ratios within and between the similar shapes. Then solve for the unknown side length. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/8a386862-d0fe-4fe9-9f24-8e9f3d81e569_1280_720_base.png Relating side lengths in similar figures Given a pair of similar figures, write proportion statements that relate a side with an unknown length to known side lengths, using both ratios within and between the similar shapes. Then solve for the unknown side length. https://cdn.kastatic.org/ka-youtube-converted/zuV24mxOEfU.mp4/zuV24mxOEfU.mp4 267 Exploring geometric figures https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-transformations-intro/v/introduction-to-transformations 2023-05-12T21:01:01.897246564Z Rigid transformations intro Transformations in math involve changing a shape's position or which way the shape points. There are three main types: translations (moving the shape), rotations (turning the shape), and reflections (flipping the shape like a mirror image). Rigid transformations keep the shape's size and angles the same. The image is the shape in its new position and direction. video https://cdn.kastatic.org/googleusercontent/N7hCRdFMymh36aIKEaMUOfM717F6tWCMcIqdHYv1A1t8iFQk_MwtL3EIkag2-3ZOwvcGgHgbBB_vL6nhPc_SnpeS Rigid transformations intro Transformations in math involve changing a shape's position or which way the shape points. There are three main types: translations (moving the shape), rotations (turning the shape), and reflections (flipping the shape like a mirror image). Rigid transformations keep the shape's size and angles the same. The image is the shape in its new position and direction. https://cdn.kastatic.org/ka-youtube-converted/XiAoUDfrar0.mp4/XiAoUDfrar0.mp4 443 Exploring geometric figures https://www.khanacademy.org/math/geometry/hs-geo-transformations/hs-geo-transformations-intro/v/dilations-intro 2023-05-12T21:01:01.897246564Z Dilations intro Dilations are a type of non-rigid transformation. They change the size of a shape by scaling it up or down, making it bigger or smaller. Unlike rigid transformations, dilations do not keep the shape's size the same. video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Dilations intro Dilations are a type of non-rigid transformation. They change the size of a shape by scaling it up or down, making it bigger or smaller. Unlike rigid transformations, dilations do not keep the shape's size the same. https://cdn.kastatic.org/ka-youtube-converted/Kv-lyVmQ5ps.mp4/Kv-lyVmQ5ps.mp4 91 Exploring geometric figures https://www.khanacademy.org/math/revision-tg-math-class-8/x9ce0e841a99d4a8a:week-2/x9ce0e841a99d4a8a:exploring-geometric-figures/v/constructing-a-dilation 2025-10-27T11:00:46.958143659Z Constructing a Dilation In this video, we explore the concept of dilation in geometry—a transformation that resizes figures while preserving their shape. You'll learn what dilation means, how to identify the center of dilation, and how the scale factor determines whether a figure enlarges or shrinks. Through a clear example, we show how dilation affects distances and proportions, followed by a step-by-step construction of a dilation using geometric tools. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction 00:23 Example of dilation 00:34 Centre of dilaton 00:50 Scale factor 02:03 Constructing a dilation 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 Constructing a Dilation In this video, we explore the concept of dilation in geometry—a transformation that resizes figures while preserving their shape. You'll learn what dilation means, how to identify the center of dilation, and how the scale factor determines whether a figure enlarges or shrinks. Through a clear example, we show how dilation affects distances and proportions, followed by a step-by-step construction of a dilation using geometric tools. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction 00:23 Example of dilation 00:34 Centre of dilaton 00:50 Scale factor 02:03 Constructing a dilation 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/dAkFWrx7gco.mp4/dAkFWrx7gco.mp4 306 Exploring geometric figures https://www.khanacademy.org/math/ka-math-class-7/x26f4f4b84655c15c:symmetry-ncert-new/x26f4f4b84655c15c:rotational-symmetry/v/order-of-rotation-center-of-rotation 2025-06-03T05:13:02.001072094Z Order of rotation, Center of rotation Explore the concepts of central angle and order of rotation with this in-depth video! Learn how to identify the central angle and calculate it with precision. Dive deeper into rotational symmetry by discovering how to determine the order of rotation for various shapes and patterns. This video provides clear explanations and practical examples to help you master these essential geometry skills with confidence! Mahak Wasan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Order of rotation, Center of rotation Explore the concepts of central angle and order of rotation with this in-depth video! Learn how to identify the central angle and calculate it with precision. Dive deeper into rotational symmetry by discovering how to determine the order of rotation for various shapes and patterns. This video provides clear explanations and practical examples to help you master these essential geometry skills with confidence! https://cdn.kastatic.org/ka-youtube-converted/vELA60vPMGw.mp4/vELA60vPMGw.mp4 404 Exploring geometric figures https://www.khanacademy.org/math/revision-tg-math-class-8/x9ce0e841a99d4a8a:week-2/x9ce0e841a99d4a8a:exploring-geometric-figures/v/point-symmetry 2025-10-27T11:00:46.958143659Z Point Symmetry In this video, we explore the concept of point symmetry—a fascinating geometric idea where a figure looks the same when rotated 180° around a central point. You'll get a clear introduction to what point symmetry means, see engaging examples from everyday shapes, and even discover which English alphabets exhibit point symmetry (like S, Z, and N!). To reinforce your understanding, we wrap up with a short exercise that challenges you to identify if a shape shows point symmetry or not. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction to point symmetry 00:42 Formal definition of point symmetry 01:08 Figures showing point symmetry 01:48 Alphabets showing point symmetry 02:21 A short exercise for practice 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 Point Symmetry In this video, we explore the concept of point symmetry—a fascinating geometric idea where a figure looks the same when rotated 180° around a central point. You'll get a clear introduction to what point symmetry means, see engaging examples from everyday shapes, and even discover which English alphabets exhibit point symmetry (like S, Z, and N!). To reinforce your understanding, we wrap up with a short exercise that challenges you to identify if a shape shows point symmetry or not. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction to point symmetry 00:42 Formal definition of point symmetry 01:08 Figures showing point symmetry 01:48 Alphabets showing point symmetry 02:21 A short exercise for practice 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/l0kxNks_q5g.mp4/l0kxNks_q5g.mp4 249 Exploring geometric figures https://www.khanacademy.org/math/revision-tg-math-class-8/x9ce0e841a99d4a8a:week-2/x9ce0e841a99d4a8a:exploring-geometric-figures/e/revision-exploring-geometrical-figures-tg-class-8 2026-02-18T21:20:35.275198076Z Revision exploring geometrical figures TG class 8 . Khan Academy exercise