Question

problem 10: from this given statement, select the definition, property, postulate, or theorem that justifies the prove statement. given: ∠2 and ∠5 are a linear pair. prove: ∠2 and ∠5 are supplementary. a b c d e if two angles are a linear pair, then they are supplementary.

Explanation:

By the definition of a linear - pair of angles, a linear pair forms a straight - line and the sum of the measures of angles in a linear pair is 180 degrees, which means they are supplementary.

Answer:

A. If two angles are a linear pair, then they are supplementary.