Question

an 18 foot leans against a wall. The base of the ladder is 9 feet from the wall on the level ground. How many feet up the wall, to the nearest tenth of a foot, is the top of the ladder

Answer 1

15.6

Explanation:

We need to use Pythagorean theorem:

hypotenuse ² =( leg 1)² + (leg 2)²

Hypotenuse is 18 ft.

leg 1 = 9 ft.

18² = 9² + (leg2)²

(leg 2)² = 243

(leg 2) = +√243 ≈ 15.6 (ft)