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# the radius of a circle when the numeric values of the circumference and the area are equal?

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- 1 decade ago
C=2(pi)r

A=(pi)r^2

2(pi)r = (pi)r^2 cancel out pi

2r=r^2 what number for r would make these equal to eachother?

There is only one number that is the same squared as it is when multiplied by 2, and that is 2 since 2 times itself is the same as 2 times 2.

The radius is 2.

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