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6 December, 05:43

The circumference of a circle is 11pi inches. what is the area, in square inches, of the circle? express in terms of pi.

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  1. 6 December, 05:46
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    Circumference = 2 * pi * r, where r is the radius

    For this circle, the circumference is 11pi, so 11pi=2*pi*radius. Divide both sides by 2pi and you get r is = to 5.5 inches.

    Area of a circle is pi*r^2. Since we just saw that r = 5.5 inches, the circle has an area of 5.5 inches * 5.5 inches * pi or 30.25 pi inches squared.
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