https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-circle-basics/v/language-and-notation-of-the-circle 2021-02-16T16:08:13Z Circles glossary Formal definition of a circle. Tangent and secant lines. Diameters and radii. major and minor arcs Sal Khan video https://cdn.kastatic.org/googleusercontent/SWae14xdpXW141daSvXpqUJZzzdAUuYNQ8-Zz-oWkTnYjVHewnV66scU53oFOzvcpEBnymxptuVTkmroZudMhhyh Circles glossary Formal definition of a circle. Tangent and secant lines. Diameters and radii. major and minor arcs https://cdn.kastatic.org/ka-youtube-converted/U2W7HPyC0cM.mp4/U2W7HPyC0cM.mp4 672 Circles