Respuesta :
Using the Pythagorean Theorem:
15^2 = 9^2 + height^2
height^2 = 225 -81
height^2 = 144
height = 12
The ladder goes 12 feet up the wall.
15^2 = 9^2 + height^2
height^2 = 225 -81
height^2 = 144
height = 12
The ladder goes 12 feet up the wall.