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Math Help - Confused on this problem

  1. #1
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    Confused on this problem

    In this parallelogram, the measure of Angle B exceeds the measure of Angle A by 30 degrees. What is the measure of Angle D?

    Can anyone explain how I find this? I have several other problems that are similar to t
    his.
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  2. #2
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    use the fact that A and B are supplementary ...

    A + B = 180

    B = A + 30

    finish up
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  3. #3
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    So A = 90 and B = 90?
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  4. #4
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    Quote Originally Posted by Marc9118 View Post
    So A = 90 and B = 90?
    no


    adjacent angles of a parallelogram are supplementary ... this tells you that

    A + B = 180 (this does not mean A = B)

    you were also told that B was 30 degrees bigger than A ...

    B = A + 30

    substitute (A+30) for B in the first equation ...

    A + (A + 30) = 180

    now, solve for A , then calculate B.
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