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28 October, 01:27

If a 20-foot ladder makes a 65° angle with the ground, how many feet up a wall will it reach? Round your answer to the nearest tenth.

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  1. 28 October, 05:14
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    We have an angle, a hypotenuse - the ladder length - and we're looking for the opposite side ... the sine seems the way to go, here ...

    sin 65 = opp / 20 multiply both sides by 20

    20 sin 65 = opp = about 18.13 ft up the wall
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