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Math Help - Congruent Polygon

  1. #1
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    Congruent Polygon

    Polygon ABCD is congruent to polygon A'B'C'D'. If angle A corresponds to angle A',the value of angle A' is 5x - 65 and the value of angle A is 2x - 5,
    find angle A.
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  2. #2
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    Quote Originally Posted by symmetry View Post
    Polygon ABCD is congruent to polygon A'B'C'D'. If angle A corresponds to angle A',the value of angle A' is 5x - 65 and the value of angle A is 2x - 5,
    find angle A.
    Because they correspond, you know that angle A is equal to angle A'

    Therefore: 2x-5=5x-65\quad\rightarrow\quad 3x=60\quad\rightarrow\quad x=20
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  3. #3
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    ok

    You are great!

    Thanks!
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