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OpenStudy (anonymous):
Which of the following is a true biconditional? A. Two angles are vertical if and only if they are congruent. B. Two lines intersect if and only if their intersection is one point. C. If two angles are a linear pair, then they are supplementary. D. Two angles are adjacent if and only if they are a linear pair.
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OpenStudy (anonymous):
Is A the correct answer?
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