the formula to find the circumference of a circle is pi times the diameter. So basically take the diameter and multiply it by 3.14 and that's the circumference.
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The circumference of a circle is (diameter) multiplied by (pi).
pi times diameter
Circumference is pi times the diameter
Circumference of a circle = pi*diameter Circumference = 50.26548246 or 50 to the nearest inch
Circumference = pi*diameter = 21.99 inches, approx.