Circumference of a circle: 2*pi*radius or pi*diameter
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Circumference of circle: 6*pi inches
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 = 6*pi inches
To calculate the diameter from the circumference, divide the circumference by pi - π 6' = 72 inches. 72 / π = 22.9 inches