A 10-foot ladder is leaning against a wall. The base of the ladder is 2 feet from the base of the building. How far up the building does the ladder fall?

Answer 1

a^2 + b^2 = c^2

The hypotenuse is the ladder.

2^2 + b^2 = 10^2
4 + b^2 = 100
b^2 = 96
b = 9.8 feet