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6 November, 07:27

Find the supplementary angle to an angle that is 128.9°. Explain your answer.

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Answers (2)
  1. 6 November, 07:37
    0
    Supplementary angles add up to 180°, thus the supplementary angle to 128.9° would be:

    180 - 128.9 = 51.1°
  2. 6 November, 10:27
    0
    Supplementary angles are 180 degrees, so subtract 128.9 by 180. This should give you 51.1.
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