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The circumference of a circle is 28π. What is its radius?
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The circumference of a circle is 28π. What is its radius?

User ComeOnGetMe
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C = 2*pi*r, so 28pi = 2*pi*r. Divide both sides by 2 to get 14*pi = pi*r, then divide by pi to get 14 = r, or r = 14.

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User Jcccn
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