Sphere
From Conservapedia
A wireframe sphere.
A sphere is the set of all points in three-dimensional euclidean space (R3) 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=4πr²
- V=1⅓πr³
For any positive radius r.
