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A circle has a circumference of 81.64cm. What is its Radius?
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A circle has a circumference of 81.64cm. What is its Radius?

User Mhitza
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circumference = 2 * \pi * radius


\pi = 3.14


Substitute \ 3.14 \ for \ \pi


81.64 cm = 2 * 3.14 * radius


81.64cm / (2 * 3.14) = radius


81.64cm / 6.28 = radius


13 cm = radius
User BehrouzMoslem
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