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A 13​-foot ladder is placed against a vertical wall of a​ building, with the bottom of the ladder standing on level ground 10 feet from the base of the building. How high up the wall does the ladder​ reach?

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Pythagorean theorem. About 8.31 ft
A 13​-foot ladder is placed against a vertical wall of a​ building, with the bottom-example-1
User Wayne Conrad
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