References
- William Dunham. "Pages 28, 226", The Mathematical Universe: An Alphabetical Journey Through the Great Proofs, Problems and Personalities, ISBN 0-471-17661-3.
<<Table of Contents A sphere is a perfectly round geometrical object in three-dimensional space, such as the shape of a round ball. Like a circle in two dimensions, a perfect sphere is completely symmetrical around its center, with all points on the surface lying the same distance r from the center point. This distance r is known as the radius of the sphere. The | Next>> | Show All>>