Asked by Hannah

Find the SURFACE AREA of a sphere that has a diameter of 18 centimeters. Leave your answer in terms of pi.
Answered by Ms. Sue
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.
Answered by Hannah
sa =4 x 3.14x 9^2
sa = 324 pie
Answered by Ms. Sue
Right
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