Question

A ramp rises 5 feet and is 13 feet long. What horizontal distance h, in feet, does the ramp cover?

Answer 1

This is a job for Pythagoras.

a^2 + b^2 = c^2

5^2 + b^2 = 13^2
25 + b^2 = 169
b^2 = 169 - 25
b^2 = 144
b = 12