Question

The bottom Of a ladder must be 3 feet from a wall. The ladder is 12 feet long. how far above the ground does the ladder touch the wall

Answer 1

About 11.62 feet because, using the pythagorean theorem, 12 would be the hypotenuse and 3 would be one of the feet. so you do 12^2-3^2, which is 135 and then take the square root of 135 to give you the other foot (the height)