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23 December, 09:15

If two angles are supplementary and congruent, what is the measure of each angle?

45°

100°

90°

180°

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Answers (1)
  1. 23 December, 09:27
    0
    Supplementary means x+y=180

    congruent means they have the same measure x=y

    so x+y=x+x=y+y=180=2x=2y

    2x=2y=180d

    divide by 2

    x=y=90

    the answers are 90 and 90
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