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20 September, 12:08

A circle has an area of 324 pi feet squared. what is the circumference?

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  1. 20 September, 12:35
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    The area of a circle is pi*r^2 so 324/pi is 103 if you take the square root of that it is 10.15. so you would use the circumference formula now, which is 2 pi r so 2*pi*10.15 = 63.77
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