Question

A 12-foot ladder is placed four feet from the base of a wall.

How far up the wall will the ladder reach?

Answer 1

Answer:8sqrt 2 or sqrt 128

Explanation:

We can use the Pythagorean Theorem. Since the ladder is leaning against the wall, it is the hypotenuse. It is also 4 feet away from the wall so 12^2-4^2=b^2 b^2=128 so b=8sqrt 2 or sqrt 128.