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OpenStudy (anonymous):
if a cirlce has an area of 36pi square feet find the circumference of the circle PLEASE HELP!
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OpenStudy (anonymous):
12pi
OpenStudy (anonymous):
36pi = pi x r^2 r = 6 Circumference = 2pi x r = 12pi
OpenStudy (anonymous):
got it?
OpenStudy (anonymous):
\[36\pi^2 = \pi *r^2\], so if you simplfy "pi"s and then take square root of both sides, you get r=6.
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