Homework Help: Geometry

Posted by Nancy on Friday, June 22, 2012 at 1:12pm.

I need help on a problem thats on formula for circumference. A circle has a circumference of 36 cm. find it's radius .but it says give an exact answer in simplest form and it says enter pi for the symbol of pie .

Geometry - Ms. Sue, Friday, June 22, 2012 at 1:21pm
C = pi * r^2

36 = 3.14 * r^2

36/3.14 = r^2

11.464968 = r^2

3.3859958 = r

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