math

A ladder leans against a wall four feet above the ground. The base of the ladder is three feet from the wall. How long is the ladder?

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  1. Use the Pythagorean theorem:

    a^2 + b^2 = c^2

    4^2 + 3^2 = c^2
    16 + 9 = c^2
    25 = c^2
    5 = c

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    Ms. Sue

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