The circumference of a circle with a diameter of 8 centimeters is 25.12 centimeters. This is found using the following formula: circumference equals pi multiplied by the circle's diameter. More »

There are different ways to find the diameter of a circle depending on what information you start with. If you know the circumference of the circle, divide the circumference by pi to find the diameter. More »

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Find the diameter of a circle with a given circumference by solving for the formula "d=C/pi," where d is the diameter, C is the circumference and pi is 3.1459. For this problem, find the diameter of a circle that has a c... More »

To find the circumference of a circle, multiply the diameter by pi or double the radius times pi. Pi is an unchanging number that rounds off to 3.14. More »

Find the diameter of a circle with a given circumference by solving for the formula "d=C/pi," where d is the diameter, C is the circumference and pi is 3.1459. For this problem, find the diameter of a circle that has a c... More »

A mathematics teacher named William Jones is credited with first using the symbol π in 1706 to represent the concept of the ratio between a circle's circumference and diameter. It had previously been ill-defined. More »

To calculate a circle's diameter from its circumference, one should divide the circumference by the constant pi, which is an irrational number approximately equal to 3.14159265358979. More »