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the second angle of the a triangle is twice as large as the first angle. the measure of the third angle is 20 degrees less than the second. how large is each angle?

  • math -

    First angle = A
    second angle = B
    Third angle = 3
    A + B + C = 180
    B = 2A
    C = B - 20

    B/2 + B + (B-20) = 180
    5/2 B = 200
    B = (2/5)*200 = 80
    You finish it.

  • math -

    40 degrees 60 degrees and 80 degrees

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