by timesing the circumference by pie
Divide the circumference by Pi.
If you have only the diameter to get the circumference you have to multiply the circumference by pi: 3.14
Circumference = pi*d. So d = Circumference/pi
Radius = circumference/pi
circumference is only in a circle. Circumference only applies to circles, ellipses, or other round objects. If you want to find the "perimeter," add up all three sides.
Circumference = 2*pi*radius So Radius = Circumference/(2*pi)
Divide the circumference by (2*pi)
Radius = Circumference/(2*pi)
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Divide the circumference by the value Pi - this will give you the diameter.
The circumference is equal to pi times the diameter. To find the diamter take the circumference and divide by pi. Pi = 3.14