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8 December, 18:15

If the radius of a circle is 10 feet, how long is the arc subtended by an angle measuring 81°? A) 9π feet

B) 29 π feet

C) 95 π feet D) 92π feet

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  1. 8 December, 20:58
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    Circumference = 2 * PI * radius

    circumference = 2 * PI * 10

    arc length = (81 / 360) * 2 * PI * 10

    arc length = (1,620 / 360) PI

    arc length = 4.5 PI feet

    Which is not one of the choices
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