A sphere is a shape where the distance from the center to the edge is the same in all directions. This distance is called the radius ( r ).
Surface area = 4πr2
Volume = 4/3πr3
Surface Area and Volume Formulas
By Anne Marie Helmenstine, Ph.D., About.com Guide
Explore Chemistry
Must Reads
About.com Special Features
A Smarter Future
Tips that will help finance your education, excel in the classroom, and advance your career. More >
How to Ace the GRE
Being well prepared is the first step; here are more essential suggestions. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.