posted by melissa .
you are building a ramp that will be in the shape of a perfect right-angled triangle. The vertical height of th ramp will be 10 feet. the horizontal base of the ramp will be 15 feet. what will be the length of the downward sloping side of the ramp?
so you are finding the hypotenuse
solve for h
h^2 = 10^2 + 15^2
btw, what is a "perfect" right-angled triangle?