Asked by Laurena

A ladder is 12 metres and leans against a tall wall. The foot of the ladder is 9 metres from the base of the wall. How far up the wall will the ladder reach?

Answers

Answered by Ms. Sue
You're looking at a right-angle triangle. Use the Pythagorean Theorem.

a^2 + b^2 = c^2

a^2 + 9^2 = 12^2

a^2 + 81 = 144

a^2 = 63

a = 7.94 meters

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