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Circumference of a CircleThe distance around a circle. It is equal to Pi () times the diameter of the circle. Pi or is a number that is approximately 3.14159.

Example:

What is the circumference of a circle having a diameter of 7.9 cm, to the nearest tenth of a cm? Using an approximation of 3.14159 for , and the fact that the circumference of a circle is times the diameter of the circle, the circumference of the circle is Pi × 7.9 3.14159 × 7.9 = 24.81…cm, which equals 24.8 cm when rounded to the nearest tenth of a cm.

or you could just measure it using a string and save yourself the math

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โˆ™ 2010-02-13 00:28:28
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Q: What the formula to find perimeter of circle?
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What is the formula of a perimeter of a circle?

to find the perimeter of a circle you simply do this (pi x D )


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The formula for the perimeter of a whole circle is 2 π r therefore the perimeter of a half circle will be (2 π r)/2 which is π r n.b. the perimeter of a circle is normally referred to as the circumference...


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this is called finding the circumference. The formula is 2*pie*radius


What is the formula for finding perimeter of a circle?

The formula for the circumference of a circle is pi * diameter or (2 radius.)


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