trigonometry
posted by rose on .
A carpenter is building a house. He is constructing the roof. The roof has an angle of elevation of 40° from the horizontal. The height he wants to make the roof is 18 feet. How far is it from the bottom edge of the roof to the top of the roof? (Find the hypotenuse to the nearest hundredth)

draw a diagram. If the distance is x,
18/x = sin40°
plug and chug to solve for x