https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-transformation-properties-and-proofs/xff63fac4:hs-geo-proofs-with-transformations/v/line-and-angle-proofs-exercise 2021-02-16T16:08:13Z Proofs with transformations video https://cdn.kastatic.org/googleusercontent/KsMmLv9v-rrhQDU-5rHw5JVoWf1EcjFGqRfGqJzCCbpZr-lcdOqv-BFQKgwQI678GNOUjFuQWF_EbX1fYPT4ELM Proofs with transformations https://cdn.kastatic.org/ka-youtube-converted/uYXhga17q1g.mp4/uYXhga17q1g.mp4 525 Proofs with transformations https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-transformation-properties-and-proofs/xff63fac4:hs-geo-proofs-with-transformations/e/proofs-with-transformations 2025-06-26T23:37:20.050318446Z Proofs with transformations Prove theorems about lines and angles using transformations. Tomer Gal exercise