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17 October, 21:53

The radius of a circle is 15 miles. What is the angle measure of an arc bounding a sector with area 5 square miles?

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  1. 17 October, 22:01
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    X / 10pi = 360 / ((pi) (r^2))

    To isolate x, multiply both sides by 10pi

    x = 360 / ((pi) (r^2)) (10pi) = 3600/r^2 = 3600 / 20^2 = 9 degrees
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