Circle M Various Artists

Circle Circle Simple curve of Euclidean geometry This article is about the shape and mathematical concept. For other uses, see Circle (disambiguation). A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. The distance between any point of the circle and the centre is called the radius. The length of a line segment connecting two points on the circle and passing through the centre is called the diameter. A circle bounds a region of the plane called a disc. Quick facts Type, Symmetry group ... Circle A circle circumference C diameter D radius R centre or origin O Type Conic section Symmetry group O(2) Area πR2…

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