Circumference = pi x the diameter of the circle
C = pi (12 inches)
So C = 3.14159 X 12
C =37.69906 (approx)
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Circumference = 37.7 inches Diameter = 12 inches
The circumference of a circle is pi * diameter. therefore 3.14 * 12 = 37.699 inches.
37 45/64 inches.
circumference = 12*pi = 37.699 inches to 3 decimal places
Multiply the diameter by Pi - in which case it's 37.699 inches.