Circle
Circle is a simple shape of Euclidean geometry that is the set of points in the plane that are equidistant from a given point, the centre. A circle is a simple closed curve which divides the plane into 3 regions: Interior, Exterior and On In everyday use, the term "circle" may be used interchangeably to refer to either the boundary of the figure, or to the whole figure including its interior; in strict technical usage, the circle is the former and the latter is called a disk.
