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# How do you find the radius of a circle when given the circumference?

Wiki User

2012-12-22 20:01:44

The radius is the circumference divided by 2 x pi.

C= pi(2r)

R=C/2pi

Divide the circumference by Pi (about 3.1416). This gives you the diameter. Now divide the diameter by two to get the radius.

Divide the circumference by pi divided by 2
Visit the website in the related link. The formula (any algebraic expression) for the different parts of the circle are on there, and it explains it very well.

Wiki User

2012-12-22 20:01:44
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