# Need Geometry help with the circumference of a circle

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### Question Description

alancheng
School: Rice University

We know the radius is 12cm.

We want the circumference of the circle.  The formula for circumference is C = pi * d

where d = diameter and pi is the number 3.1415926535...

C = 3.1415926535 * 2*12 = 75.398  cm.

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Anonymous
Thanks, good work

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