A boy standing on the ground 25 feet from the base of a building looks up at the top of a building. The angle of elevation is 72°. Disregarding the boy’s height, how tall is the building? Round your answer to the nearest tenth of a foot.

7.7 feet 8.1 feet
23.8 feet 76.9 feet

Question

A boy standing on the ground 25 feet from the base of a building looks up at the top of a building. The angle of elevation is 72°. Disregarding the boy’s height, how tall is the building? Round your answer to the nearest tenth of a foot.

	7.7 feet		8.1 feet
	23.8 feet		76.9 feet

anonymous · Answer

tan(72)=x/25
tan(72)25=x
x=76.9