Help please!

A 24-foot ladder rests against a house near a second story window 20 feet from the ground. Assume that the ladder and the house both sit on level ground.


To the nearest whole number, find the following values:

AThe measure of the angle formed by the base of the ladder and level ground is _______

BThe measure of the angle formed by the top of the ladder and the second story window is __________

CThe distance, on level ground, between the base of the ladder and the house is

_________ feet.

(Theres no picture with this equation.)