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Remember the circle eq'n.;-

C = 2 pi r

By algebraic rearrangement

r = C / (2*pi)

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lenpollock

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7mo ago

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More answers

The circumference (c) of a circle = 2πr (where r = radius). Therefore if you know the circumference, the radius (r) = c/2π.

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Wiki User

15y ago
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Q: What is the radius of a circle if given the circumfrence?
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