It is a solid figure where all points on it's surface are the same distance from the center of the figure. A sphere is a shape in space that is like the surface of a ball. Usually the terms ball and sphere are used alike. But in mathematics, the precise (exact) definition only allows points in the 3 dimensional space which are uniformly and symmetrically located at a fixed length called radius of the sphere.
Examples of these are basketballs, superballs, and playground balls.
A sphere is the 3 dimensional analogue of a circle.
