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Math Help - Triangle equations and another shapes

  1. #1
    Junior Member
    Joined
    Sep 2007
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    Oregon, West Coast ^_^
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    Exclamation Triangle equations and another shapes

    If someone could answer this problems and show how you got the answer please. Ok I'm bad at equation with x^2 in them:
    (This problem goes to the triangle)
    Solve the eqution:
    7^2+x^2=(x+1)^2

    What is the perimeter of the triangle?

    And the rest is in the image below Thanks:::

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  2. #2
    siempretacos
    Guest
    The first problem you can use the pythagorean theorem. To get the equation:7^2 + X^2 = (X+1)^2
    Then, if you expand.. you get 49 + X^2 = X^2 + 2X + 1
    Simplify to get 49 = 2X + 1
    Then solve to get X= 24
    You might want to note that this is a special 7,24,25 triangle.

    For the second problem, you might want to set up proportions because they are similar figures.
    ex. (8/12)= (6/X)
    (8/12)= (Y/6)
    (8/12)= (Z/10)
    Then you'll easily get the answers and find the perimeter. I think....
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