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14 May, 17:45

If the radius of a circle is 10 feet, how long is the arc subtended by an angle measuring 81°?

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  1. 14 May, 18:32
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    Circumference of the entire circle = 2 * PI * radius

    circumference = 2 * PI * radius

    circumference = 62.832

    81 degrees is (81 / 360) or. 225 of the entire circumference

    so the 81 degree arc =.225 * 62.832 = 14.137 feet
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