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Marlene noticed that when a pair of parallel lines was cut by a transversal, two particular vertical angles were reflections of each other. What can she conclude from this observation? A. the measures of the angles must be equal. B.the angles must be complementary. C.the angles must be supplementary. D.the measures of the angles must add to 360°.

Answer :

C. The measures must be supplementary bc a line is 180º and supplementary means 180º plus the angles are vertical of each other so that means they are on the same line. I hope this helps

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