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If you know the circumference of a circle, what is the r?

Mathematics
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If you know the circumference of a circle, what is the r? 

Jul 8th, 2014

Divide Circumference by pi (3.1415) to get diameter. Divide diameter by 2 to get radius.

 if you are given any one of the following, radius, diameter, circumference, or area. You can find all of the others. Memorize the formulas for Circumference (Pi*diameter) and Area (Pi * Radius squared) and the fact that radius * 2 = diameter, and you can do all of them. 
so:

Circumference = 2 Pi R 

To find R you divide the circumference 
by (2 Pi) 

R = Circumference /(2*3.14159)

Jul 8th, 2014

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Jul 8th, 2014
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Jul 8th, 2014
Dec 10th, 2016
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