# Sphere

From Conservapedia

(Redirected from Spheres)

A **sphere** is the set of all points in three-dimensional euclidean space (**R**^{3}) which are at a fixed distance *r* (called radius) away from a point called the center.

A generalization of it is the set of points which in some vector space is, according to a specified norm, equidistant.

The surface area of a sphere is equal to four times pi times the square of the radius, and the volume of a sphere is equal to four-thirds times the cube of the radius. Thus:

- SA=4π
*r*² - V=1⅓π
*r*³

For any positive radius *r*.