TAGORE B.Ed 2017-2019 student portfolios

Circle Geometry Properties Calvin Lin  contributed Can you find the numerous circle properties in the image? Click on the link to learn more. Radius is the same length :  Angle at center is twice angle at circumference :  . Inscribed angle theorem :  . Thales' theorem :  . Alternate segment theorem :  Perpendicular tangent theorem :  . Tangents to the circle from a point have the same length:  . Opposite angles in a cyclic quadrilateral :  .

This article is about the shape and mathematical concept. For other uses, see  Circle (disambiguation) . "360 degrees" and "360°" redirect here. For other uses, see  360 degrees (disambiguation) . Circle A circle (black), which is measured by its circumference ( C ), diameter ( D ) in cyan, and radius ( R ) in red; its centre ( O ) is in magenta. A  circle  is a simple closed  shape . It is the set of all  points  in a  plane  that are at a given distance from a given point, the  centre ; equivalently it is the curve traced out by a point that moves so that its distance from a given point is  constant . The distance between any of the points and the centre is called the  radius . This article is about circles in  Euclidean geometry , and, in particular, the Euclidean plane, except where otherwise noted.