A ladder 20 feet long leans against a building, forming an angle of 71° with the level ground. To the nearest foot, how high up the wall of the building does the ladder touch the building?

18.91

Step-by-step explanation:

when you write it out, 20 end up being on the hypotenuse and x(how tall the building is) is opposite from the angle, so you would do sin or as my teacher taught us how to reconise it S o/h SOH (sin opposite over hypotenuse) so you would write sin(71) = X/20 and cross multipy so you would multiply 20 X sin(71) = 18.91

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