A ladder is placed 5ft away from the house, it comes up to 12 ft on the side of the house. How long is the ladder?
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Length of Ladder = 13 ft
Length between Ladder and Wall = 5 ft
by pythagoras theorum
(hypotenuse)^2 = (perpendicular)^2 + (base)^2
(13)^2 = (height of wall)^2+(5)^2
by solving
Height of Wall = 12 ft
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