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12 August, 08:28

If two angles are supplementary and one of them is 30, what is the measurement of the second angle?

A. 180

B. 90

C. 60

D. 150

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Answers (1)
  1. 12 August, 09:32
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    You just need to know the definition of suplementary angles. Two angles are suplementary if the sum 180°. So, you now can easily deduct that the unkonwn angle is such that when sumed to 30° the result is 180° = > x + 30 = 180=> x = 180 - 30 = > x = 150°. And the answer is the option D) 150.
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