Question

your brother lies down at the ground level and uses a protector to measure the angle of elevation of the wall he finds its at 72° he is lying 12 feet 3 inches away from the rock wall what method is he using to approximate the height of the rock wall? Use this method to approximate the height of the rock wall

Answer 1

Hes using trigonomtery of a right angled triangle.

tan 72 = x / 12.25        where x = height of the wall

x = 12.25 * tan 72 =  37.7 feet