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18 September, 03:45

How can you calculate the circumference if you know the circle's radius?

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Answers (2)
  1. 18 September, 04:05
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    The circumference is the radius times 2 times 3.14
  2. 18 September, 04:14
    0
    Set up the formula for the area of a circle.

    The formula is A = πr^2 {A=/pi r^{2}}, where A equals the area of the circle, and r equals the radius. Solve for the radius ...

    Plug the area into the formula ...

    Divide the area by ...

    Take the square root.
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