A roof has a cross section that is a right triangle. The diagram shows the approximate dimensions of this cross section. Find the height h of the roof. Round your answer to the nearest tenth.
The area of this right triangle = (1/2)(product of the legs) = (1/2) (20)(13) = 130 ft^2
Area also equals (1/2) base * height
130 = (1/2) (23.9) (height) multiply both sides by 2 and divide both sides by 23.9
260 / 23.9 = height ≈ 10.9 ft