Work for Algebra

Question

A 20 foot ladder is leaning against a wall of a house. It is set 16 feet from the base of the wall. How far up the wall does the ladder reach? Round your answer to the nearest tenth of a foot.

Answer 1

20 foot ladder is 16 feet from base of wall

how high up the wall does the ladder go??

a^2 = 20^2 - 16^2 = 400 -256 = 144

a = sqr144 = 12 feet

It's a Pythagorean triple

a multiple of 3 -4 -5

times 4 = 3x4 - 4x4 - 5x4=

12 -16 -20