How do you find the radius of a circle if you have the circumference?

Question

Find the radius of the circle.
Circumference = 62.8 mi

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Answer 1 · 2018-05-25T14:38:09

A formula for the circumference of a circle is:

#C = 2pir#

Solve the formula for r:

#r = C/(2pi)#

Substitute in the given circumference.

Given #C = 62.8" mi"#

#r = (62.8" mi")/(2pi)#

#r = 9.995" mi"#