A ladder 8ft long leans against a wall. It rests on the ground 2ft from the wall. How high on the wall does the ladder reach?

Answer 1

Use the Pythagorean Theorem. Let a = the height on the wall.

a^2 + b^2 = c^2
a^2 + 4 = 64
a^2 = 60
a = 7.75 feet