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  1. #1
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    Arrow Geometry

    find the angles:-

    In a triangle one of the sides is double of the other and the third angle is double of the first angle.

    thanks!
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  2. #2
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    Quote Originally Posted by pickbrain View Post
    find the angles:-

    In a triangle one of the sides is double of the other and the third angle is double of the first angle.

    thanks!
    The angles of a triangle always add up to 180 degrees. One side is double the other, so then A=2B, and the third angle is double of the first angle. This is slightly ambiguous as to what the first angle is, but I read it as being A, so C=2A \Rightarrow 4B.

    Let's add up all the angles to equal one hundred and eighty degrees. A+B+C=180.

    Write everything in the form of one variable. It so happens that B is the easiest.

    2B+B+4B=180

    7B=180

    B = \frac{180}{7}

    Solve for A and C.
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