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7 February, 04:42

what is the formula for calculating the circumference, C, of a circle, if you know pi and the radius, r?

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  1. 7 February, 08:05
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    C = 2πr.

    Step-by-step explanation:

    To calculate the circumference of a circle, use the formula C = πd, where "C" is the circumference, "d" is the diameter, and π is 3.14. If you have the radius instead of the diameter, multiply it by 2 to get the diameter. You can also use the formula for circumference of a circle using radius, which is C = 2πr.
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