Question

A 70 ft ladder is mounted 10 ft above the ground on a fire truck. The bottom of the ladder is 40 ft. From the wall of a building. The top of the ladder is touching the building. How high off the ground is the top of the ladder?

Answer 1

Right triangle with hypotenuse. = 70 + 10 = 80
One side: 40. The second side is x. Use the pythagor formula:
x^2 + (40)^2 = (80)^2 --> x = ...