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4 December, 07:50

Find the length of the arc intercepted by an angle of 36° in a circle with radius 12 inches

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  1. 4 December, 11:11
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    Set up a pair of proportional ratios ...

    a / (2πr) = α/360

    a = (πrα) / 180, we are given that r=12 and α=36° so

    a=432π/180 in

    a=12π/5 in

    a=2.4π in

    a≈7.54 in (to nearest one-hundredth of an inch)
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