What is adjacent over hypotenuse

What angle is equal to the angle of depression?

If a ramp needs to be built from a point 10 feet away from a 20 foot high building and the ramp must touch the top of the building, how steep must the ramp be?

What is hypotenuse over opposite

What is the angle that is outside of the triangle instead of the one that is inside?

If you are standing 20 feet from the base of a statue and the angle of elevation from your eyes to the statue's top is 40 degrees, how tall is the statue?

What is the inverse of tangent

If an acute angle measures the degree from the top of a building to the bottom of it, is the angle depression or elevation?

If you are standing at the top of a 20 foot high cliff and looking at a rock 100 feet away from the base of the cliff, what is the angle of depression of your eyes?