https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-standard-equation/v/radius-and-center-for-a-circle-equation-in-standard-form 2021-06-08T19:10:24Z Features of a circle from its standard equation Sal finds the center and the radius of the circle whose equation is (x+3)^2+(y-4)^2=49. Sal Khan video https://cdn.kastatic.org/googleusercontent/5rX2mO1KtbbA3mknyYqqqJ7CI16rAzvA_IaoyoOg6qH2dyOECl4-P1B7iesXvsOGtMdBmjLjwGTBpqHtjDSkURvL Features of a circle from its standard equation Sal finds the center and the radius of the circle whose equation is (x+3)^2+(y-4)^2=49. https://cdn.kastatic.org/ka-youtube-converted/JvDpYlyKkNU.mp4/JvDpYlyKkNU.mp4 231 Standard equation of a circle https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-standard-equation/e/equation_of_a_circle_1 2025-09-24T21:00:54.429253155Z Features of a circle from its standard equation Find the center and radius of a circle given the equation in standard form. Sid Patel exercise https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-standard-equation/v/graphing-a-circle-from-standard-equation 2022-10-07T00:00:24.225559754Z Graphing a circle from its standard equation Sal graphs the circle whose equation is (x+5)²+(y-5)²=4. video https://cdn.kastatic.org/ka_thumbnails_cache/50cfb882-fbc7-445f-8c1c-ebb4129e9961_1280_720_base.png Graphing a circle from its standard equation Sal graphs the circle whose equation is (x+5)²+(y-5)²=4. https://cdn.kastatic.org/ka-youtube-converted/thDrJvWNI8M.mp4/thDrJvWNI8M.mp4 314 Standard equation of a circle https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-standard-equation/e/graphing_circles 2026-03-19T10:29:23.537306434Z Graph a circle from its standard equation Given the standard form equation of a circle, graph the circle. For example, graph the circle whose equation is (x+5)²+(y+2)²=4. Sid Patel exercise https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-standard-equation/v/writing-standard-equation-of-circle 2022-10-07T00:00:24.225559754Z Writing standard equation of a circle Given a circle on the coordinate plane, Sal finds its standard equation, which is an equation in the form (x-a)²+(y-b)²=r². video https://cdn.kastatic.org/ka_thumbnails_cache/e02a9a45-7965-4d42-be70-a6f4d2bd2c79_1280_720_base.png Writing standard equation of a circle Given a circle on the coordinate plane, Sal finds its standard equation, which is an equation in the form (x-a)²+(y-b)²=r². https://cdn.kastatic.org/ka-youtube-converted/iX5UgArMyiI.mp4/iX5UgArMyiI.mp4 340 Standard equation of a circle https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-standard-equation/e/write-the-equation-of-a-circle 2026-06-09T17:40:46.212160686Z Write standard equation of a circle Given the graph of a circle or its features, find its standard equation. Sid Patel exercise