SOLUTION: Two angles are supplementary, if and only if, their sum is 180 ͦ.

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Question 1183313: Two angles are supplementary, if and only if, their sum is 180 ͦ.
Answer by ikleyn(52908) About Me  (Show Source):
You can put this solution on YOUR website!
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Correct.

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    - Angles basics
    - HOW TO solve problems on supplementary, complementary or vertical angles - Examples
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