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A circle has a curcumference that measures 18pi inches. What is the radius in inches of the circle?
Wiki User
∙ 14y ago
Circumference equals 2 X pi X radius, so work backwards.
18pi=2 X pi X radius
divide pi.
18= 2 X radius
divide by 2.
radius= 9.
Wiki User
∙ 14y ago
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