Find the SURFACE AREA of a sphere that has a diameter of 18 centimeters. Leave your answer in terms of pi.

Answer 1

SA = 4 * pi * r^2

http://www.math.com/tables/geometry/surfareas.htm

Remember, the radius is half the diameter.

I'll be glad to check your answer.

Answer 2

sa =4 x 3.14x 9^2
sa = 324 pie

Answer 3

Right