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Math Help - How much will it cost?

  1. #1
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    Angry How much will it cost?

    The fencing cost $2.50 per foot.

    The three angles given are
    90 degrees (2)
    and 128 degrees

    the two lengths given are

    50ft on the very top
    and on the far left side it's 30ft

    Help! So lost
    I though I would break it in half to two seperate triangles and do pythagorean theorem
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  2. #2
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    Quote Originally Posted by livelaughlove16 View Post
    The fencing cost $2.50 per foot.

    The three angles given are
    90 degrees (2)
    and 128 degrees

    the two lengths given are

    50ft on the very top
    and on the far left side it's 30ft

    Help! So lost
    I though I would break it in half to two seperate triangles and do pythagorean theorem
    Split the trapezoid into a rectangle and a right triangle. You know the lengths of the sides of the rectangle, and you know the upper angle of the triangle ( 128^\circ-90^\circ), so you can use simple trigonometry to find the length of the opposite side; the Pythagorean Theorem will then give the length of the hypotenuse.
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