The circumference of a circle is pi * diameter.
therefore
3.14 * 12 = 37.699 inches.
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Diameter of circle: 12/pi = 3.8197 meters to four decimal places
12 feet. The diameter of a circle is twice its radius.
The area of a circle with a diameter of 12 inches is: 113.1 square inches.
The diameter of a circle with a circumference of 12 is: about 3.82To to this calculation for other circles, just divide the circumference by Pi (about 3.1416). The result is the diameter.
Radius of circle: 12/2 = 6 units