Circumference of the circle if the radius is 12 inches is 2*pi*r = 24*pi = 75.398
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A circle with a radius of 6 inches has a circumference of 37.7 inches.
Its circumference is: 75.4 inches.
Approximately 75.4 inches.
r = 1.91 inches.
The circumference of a circle if the radius is 12 equals about 75.4