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15 September, 10:51

What are the two formulas for circumference? Are they the same? Explain why.

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  1. 15 September, 13:17
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    I guess you are referring to a circle.

    Circumference = pi * d (where d = diameter)

    also

    C = 2 pi r which is the same as the above because d = 2r (r = radius)
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