algebra

building is 2 ft fro fence that is 9 ft tall. ladder needs to reach 13 ft from ground. ladder is placed 8 ft from fence. How long is ladder?

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1. So the foot of the ladder is 10 ft from the building.
and you want to reach a height of 13 ft
L^2 = 13^2 + 10^2 = 269
L = √269 = appr 16.4 m

Why do we have to know the fence is 9 ft high?
Am I missing something?

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