Meeka S.

asked • 04/25/19

finding circumference

How can I find the circumference of a circle with an area of 66.5 in squared?

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Doug C. answered • 04/25/19

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Since you know the area you can use the formula A = πr2 to find the radius of the circle. You will get something like r = √A/π where A = 66.5.


Once you have the value for r, then use the formula C=2πr to find the circumference of that circle.

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