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The area of a circle is 9pi in². What is the circumference, in inches? Express your answer in terms of pipi.

Solution

The area of a circle is 9\pi in². What is the circumference, in inches? Express your answer in terms of pi\pi.

Solution

c i rc u m f ere n ce : 2 π \frac{i n ^{2}}{π}

Solution steps

Given:

a re a : i n^{2}

Radius given

A re a = i n^{2} : r = \frac{n ^{2} i}{π}

Circle circumference given

r = \frac{i n ^{2}}{π} : C = 2 π \frac{n ^{2} i}{π}

c i rc u m f ere n ce : 2 π \frac{i n ^{2}}{π}

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