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17 August, 00:50

A skateboarding ramp is 12 in. high and rises at an angle of 21 °. How long is the base of the ramp? Round to the nearest inch.

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  1. 17 August, 04:34
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    the base of the ramp is 31 inches long.

    Step-by-step explanation:

    c = a/sin (α)

    = 33.48514

    b = √c2 - a2

    = √33.4851373155042 - 122

    = √977.25442103816

    = 31.26107
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