https://www.khanacademy.org/math/cc-fourth-grade-math/plane-figures/imp-line-of-symmetry/v/identifying-symmetrical-figures 2022-10-06T09:48:27.705455518Z Identifying symmetrical figures Lindsay identifies lines of symmetry on three shapes. video https://cdn.kastatic.org/ka_thumbnails_cache/34fd22eb-3b8f-4a12-9b87-9d9f111079bd_1280_720_base.png Identifying symmetrical figures Lindsay identifies lines of symmetry on three shapes. https://cdn.kastatic.org/ka-youtube-converted/59s_CQjTD6w.mp4/59s_CQjTD6w.mp4 333 Symmetry and Congruence https://www.khanacademy.org/math/4th-grade-illustrative-mathematics/xa755074f458c4b7e:properties-of-two-dimensional-shapes/xa755074f458c4b7e:symmetry-in-figures-part-2/e/drawing-lines-of-symmetry-and-symmetrical-figures 2026-04-08T00:54:09.631945657Z Draw lines of symmetry and symmetrical figures Practice drawing lines of symmetry and creating symmetrical figures. Lindsay exercise https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-transformation-properties-and-proofs/hs-geo-symmetry/v/axis-of-symmetry 2021-06-30T20:49:36Z Intro to reflective symmetry Introduction to the concept of an "axis of symmetry" Sal Khan video https://cdn.kastatic.org/googleusercontent/RX22YtkIO09r8CTvJ3jTdp0j9E8aE-4NaE_FdQbNSyGk6MP49fxOTEHnX4tX4eOfH6wT8gsXpSCV-F8Q2fmkgnmW Intro to reflective symmetry Introduction to the concept of an "axis of symmetry" https://cdn.kastatic.org/ka-youtube-converted/LrTn4cvsewk.mp4/LrTn4cvsewk.mp4 167 Symmetry and Congruence https://www.khanacademy.org/math/ka-math-class-7/x26f4f4b84655c15c:symmetry-ncert-new/x26f4f4b84655c15c:line-of-symmetry-for-regular-polygons/e/symmetry-15-a 2025-03-26T11:06:05.76570606Z Identify lines of symmetry Symmetry ashish exercise https://www.khanacademy.org/math/class-7-od/x48ac5f37f7da7ee1:symmetry-and-congruence-odia-class-7/x48ac5f37f7da7ee1:congruence-odia-class-7/v/congruent-figures-and-angles 2025-07-22T09:40:51.251638546Z Congruent Figures and Angles What do two identical phones, a pair of scissors, and floor tiles have in common? They all demonstrate the concept of congruence! This video breaks down what it means for figures to be congruent—having the exact same size and shape. Learn how moving, turning, and flipping objects helps us understand this fundamental idea in geometry, with plenty of real-world examples. ≅ Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Congruent Figures and Angles What do two identical phones, a pair of scissors, and floor tiles have in common? They all demonstrate the concept of congruence! This video breaks down what it means for figures to be congruent—having the exact same size and shape. Learn how moving, turning, and flipping objects helps us understand this fundamental idea in geometry, with plenty of real-world examples. ≅ https://cdn.kastatic.org/ka-youtube-converted/l9nWWa-MO18.mp4/l9nWWa-MO18.mp4 370 Symmetry and Congruence https://www.khanacademy.org/math/geometry-home/geometry-lines/basic-geo-measuring-segments/v/congruent-segments 2023-05-12T21:01:01.897246564Z Congruent line segments Two line segments on a number line are congruent if they have the same length. To check, you can count the number of units between the two endpoints of each line segment. If the counts are the same, the line segments are congruent. Sal Khan video https://cdn.kastatic.org/googleusercontent/6tD_5du0Xshdaqrc8kEC-A3KOyBXetqBRwz3zF8EJRjmffjrp5mxIxskV6kgVLScw3-kbyWFf5gqpTb6jYUZQmTs Congruent line segments Two line segments on a number line are congruent if they have the same length. To check, you can count the number of units between the two endpoints of each line segment. If the counts are the same, the line segments are congruent. https://cdn.kastatic.org/ka-youtube-converted/bJF9R8_-0O0.mp4/bJF9R8_-0O0.mp4 61 Symmetry and Congruence https://www.khanacademy.org/math/geometry-home/geometry-lines/basic-geo-measuring-segments/e/congruent_segments 2026-03-24T23:41:07.080866137Z Congruent segments Ben Eater exercise https://www.khanacademy.org/math/in-class-10-math-foundation-hindi/x0e256c5c12062c98:triangles-hindi/x0e256c5c12062c98:congruence-hindi/v/congruent-triangles-the-sss-criterion-hindi 2020-08-08T16:15:11Z Congruent triangles & the SSS criterion (Hindi) Anmol explains what it means for triangles to be congruent and what is a postulate/axiom. He also presents the SSS congruence postulate/criterion and its justification. video https://cdn.kastatic.org/googleusercontent/UNKp3U6pnirbZjQFpHo51t9p7T_uD4Ptdg4DmmA_Nw96DAVRz2k4Ht7wVjyTMYP8ZkxL4olEKk8fsRLcSAALcOR5 Congruent triangles & the SSS criterion (Hindi) Anmol explains what it means for triangles to be congruent and what is a postulate/axiom. He also presents the SSS congruence postulate/criterion and its justification. https://cdn.kastatic.org/ka-youtube-converted/nZyJ0YHOhyU.mp4/nZyJ0YHOhyU.mp4 657 Symmetry and Congruence https://www.khanacademy.org/math/class-9-geometry-od/x0a98afb01410c41a:congruence-of-triangles/x0a98afb01410c41a:criteria-for-congruence/v/triangle-congruence-criteria-hindi 2020-08-08T16:15:13Z Triangle congruence criteria (Hindi) Anmol introduces and justifies the SAS, ASA, AAS and RHS postulates for congruent triangles. He also shows that AAA is only good for similarity. video https://cdn.kastatic.org/googleusercontent/uJGP7OAH-dPT7ZHp15ZhOyJRgx1yKVrD6oxkIUIXABZOu9Oe4Cmnvqe226_lNK1F6-JbRrn7_1eEX7Np4bTh2W-1 Triangle congruence criteria (Hindi) Anmol introduces and justifies the SAS, ASA, AAS and RHS postulates for congruent triangles. He also shows that AAA is only good for similarity. https://cdn.kastatic.org/ka-youtube-converted/OlnD24g2CAQ.mp4/OlnD24g2CAQ.mp4 802 Symmetry and Congruence https://www.khanacademy.org/math/in-class-10-math-foundation-hindi/x0e256c5c12062c98:triangles-hindi/x0e256c5c12062c98:congruence-hindi/v/determining-congruent-triangles-hindi 2020-08-08T16:15:07Z Determining congruent triangles (Hindi) Anmol uses the SSS, ASA, SAS, and AAS postulates to find congruent triangles. video https://cdn.kastatic.org/googleusercontent/oPOiPseeglJfePfUMMy2RPgDXwATOFaqQyq1mpF1WogMMLZDVzMiTByg08XlMIha_ahe3nruCwHxJdbnEozsezU Determining congruent triangles (Hindi) Anmol uses the SSS, ASA, SAS, and AAS postulates to find congruent triangles. https://cdn.kastatic.org/ka-youtube-converted/TcTs59rVvgU.mp4/TcTs59rVvgU.mp4 444 Symmetry and Congruence https://www.khanacademy.org/math/geometry/hs-geo-congruence/xff63fac4:hs-geo-congruent-triangles/e/congruent_triangles_1 2025-04-25T04:15:25.711210865Z Determine congruent triangles Use the triangle congruence criteria SSS, SAS, ASA, and AAS to determine that two triangles are congruent. Tomer Gal exercise