A ladder that is 20 feet long leans against the side of a house. The angle of elevation of the ladder is 85°. Find the height from the top of the ladder to the ground.
The wall, ladder and ground form a right triangle. The hypotenuse is the ladder, which is 20 ft.
sin85°= x/20
20sin85°=x
x ≈ 19.924 ft.
