SOLUTION: If the area of a circle is 64 pi, what is its circumference?

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Question 50701: If the area of a circle is 64 pi, what is its circumference?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If the area of a circle is 64 pi, what is its circumference?
Area = (pi)r^2
Substitute 64(pi) in place of Area
64(pi)=(pi)r^2
Solve for "r":
r^2=64
r=8
Circumference = 2(pi)r
Substitute 8 in place of r to get:
=2(pi)8
Circumference =16(pi)
Cheers,
Stan H.