https://www.khanacademy.org/math/geometry/hs-geo-similarity/hs-geo-similar-and-congruent-triangles-modeling/v/goldren-ratio-and-rembrandt-s-self-portrait 2021-02-16T16:08:13Z Geometry word problem: the golden ratio Triangle similarity, the Golden ratio, and art, all converge in this inspiring video! Sal Khan video https://cdn.kastatic.org/googleusercontent/rRGt_Z1lPe7Hb9Nyxw0rqXvWBDJsnfxPQgV-8xVGR9mQOhh5fYhcBmoXVtlBSayGe6g2__lzJ4_DNoCasVjgT-PG Geometry word problem: the golden ratio Triangle similarity, the Golden ratio, and art, all converge in this inspiring video! https://cdn.kastatic.org/ka-youtube-converted/v5SAMuRanGM.mp4/v5SAMuRanGM.mp4 503 Area and volume of similar shapes https://www.khanacademy.org/math/revision-term-1-mh-math-class-10/x041ca11815640a3a:week-1/x041ca11815640a3a:similarity/e/ratio-of-area-of-two-triangles-1 2026-04-08T00:36:09.500768563Z Ratio of area of two triangles Ratio of area of two triangles Ashish Gupta exercise https://www.khanacademy.org/math/geometry/hs-geo-similarity/hs-geo-similar-and-congruent-triangles/e/solving-problems-with-similar-and-congruent-triangles 2025-12-30T07:05:15.972746521Z Use similar triangles Solve geometry problems with various polygons by using all you know about similarity. Ben Stenhaug exercise