https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/alg2-graphs-of-circles-intro/v/introduction-to-conic-sections 2021-05-26T15:51:55Z Intro to conic sections Sal introduces the four conic sections and shows how they are derived by intersecting planes with cones in certain ways. Sal Khan video https://cdn.kastatic.org/googleusercontent/RPWgYvDzMuiAzmQiOD9YRcWvZHF0dwBjlAHDhulF1J_WJKAg_F2Y44b_iZC_03pWPmyEhYAqttYl3kM1qUcvhoLh Intro to conic sections Sal introduces the four conic sections and shows how they are derived by intersecting planes with cones in certain ways. https://cdn.kastatic.org/ka-youtube-converted/0A7RR0oy2ho.mp4/0A7RR0oy2ho.mp4 658 Intro to graphs of circles https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/alg2-graphs-of-circles-intro/v/graphing-circles-from-features 2022-10-07T00:00:24.225559754Z Graphing circles from features How to graph a circle given the center and either the radius or another point on the circle. video https://cdn.kastatic.org/ka_thumbnails_cache/9e765387-f0e6-4144-bbeb-2eb66a45892f_1280_720_base.png Graphing circles from features How to graph a circle given the center and either the radius or another point on the circle. https://cdn.kastatic.org/ka-youtube-converted/LDjMDIuTWtM.mp4/LDjMDIuTWtM.mp4 129 Intro to graphs of circles https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/alg2-graphs-of-circles-intro/e/graph-a-circle-according-to-its-features 2026-05-11T22:10:40.765325844Z Graph a circle from its features Given information about the center and radius of a circle, graph it. Sid Patel exercise https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/alg2-graphs-of-circles-intro/v/center-and-radius-of-circle-from-graph 2022-10-07T00:00:24.225559754Z Features of a circle from its graph Given a circle on the coordinate plane, Sal finds its center and its radius. video https://cdn.kastatic.org/ka_thumbnails_cache/8c591b84-ea65-40af-9807-94972de9f580_1280_720_base.png Features of a circle from its graph Given a circle on the coordinate plane, Sal finds its center and its radius. https://cdn.kastatic.org/ka-youtube-converted/SLyM_-sQwMM.mp4/SLyM_-sQwMM.mp4 230 Intro to graphs of circles https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/alg2-graphs-of-circles-intro/e/find-the-features-of-a-circle-from-its-graph 2026-05-11T22:30:48.573944679Z Features of a circle from its graph Given the graph of a circle, find its center and radius. Sid Patel exercise