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A = C^2/(4 pi)

The area of the circle is...

The circumference squared...

divided by 4...

divided by pi

If you already know the area, then you can multiply it by 4*pi, and then the square root of the product is equal to the circumference!

C = (A*(4 pi))^(1/2)

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Q: When given a circumference how do you find the area?
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