SOLUTION: Find the area of a circle with a diameter of 20 inches. A)100 B)200 C)400 D)440 E)480

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Question 1044726: Find the area of a circle with a diameter of 20 inches.
A)100 B)200 C)400 D)440 E)480
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
.
pi%2A%28D%2F2%29%5E2, or pi%2AR%5E2.

Memorize it for all your life.