Sphere

From Simple English Wikipedia, the free encyclopedia

An image of a sphere.
An image of a sphere.

A sphere is a shape in space that is like the surface of a ball, colloquially the terms ball and sphere are used alike, but in math, the precise definition only allows points in the 3 dimensional space which are uniformly and symmetrically allocated at a fixed length called radius of the sphere.

Examples of these are basketballs, superballs, and playground balls.

In other places sphere means the earth.