An 8.5-meter ladder is leaning against a vertical wall. How many meters is its base from the wall if the ladder reaches 7.5 meters up the wall?
The ladder is the hypotenuse of a right triangle 8.5 m
one leg is 7.5
you are looking for the other leg
8.52 = 7.52 + x2 solve for positive value of 'x' which is the base-wall distance