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1. If two angles are supplementary and one of them is 30°, what is the measurement of the second angle? A. 90° B. 60° C. 180° D. 150°
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1. If two angles are supplementary and one of them is 30°, what is the measurement of the second angle? A. 90° B. 60° C. 180° D. 150°

User Ptica
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8.2k points

2 Answers

7 votes
I took the quiz myself a little bit ago, the correct answer is of course, D. 
User Gorefest
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9.0k points
3 votes
Supplementary angles always add up to 180 degrees.

180-30 degrees (known angle)= 150 degrees

Final answer: D
User Nathan Werth
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