You have to find the diameter, 12, then you have to multiply that by 3.14 or pi... which equals 37.68.
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A circle with a radius of 6 feet has a circumference of 37.7 feet.
The circumference of a circle with radius of 6 is about 37.7
The circumference of a circle whose radius is 6 inches is: 37.7 inches.
A circle with a radius of 6 inches has a circumference of 37.7 inches.
Circumference of a circle: 2*pi*radius or diameter*pi