SOLUTION: What is the exact area of a circle with a diameter of 13 inches?

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Question 439009: What is the exact area of a circle with a diameter of 13 inches?
Answer by rwm(914) About Me  (Show Source):
You can put this solution on YOUR website!
pi *r^2 is the area of a circle.
Since the problem wants exact we leave pi there.
A=pi *(13/2)^2
A=pi*(169/4)
A=pi*42.25