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Math Help - Minimizing

  1. #1
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    Minimizing

    A fence 3 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    HELP. I'm so lost !!
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  2. #2
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    Re: Minimizing

    Quote Originally Posted by habibixox View Post
    A fence 3 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    HELP. I'm so lost !!
    Start by drawing a diagram and labelling all sides.
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  3. #3
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    Re: Minimizing

    I did and I got up to

    tan^3 (theta) = 3/7

    but how do i solve for theta?
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