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C = 2 * pi * r

C is the circumference of the circle;

pi is approximately 3.1416;

r is the radius of the circle;

2r is the diameter, so C = d * pi as well.

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14y ago

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More answers

The formula for the circumference of a circle is: Circumference = πdiameter OR (π)2radius

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15y ago
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Q: What is equation for the circumference of a circle?
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