Question

two angles are said to be congruent if: a. they have the same angle measure. b. they share a side. c. the sum of their measures is 180°.

Explanation:

To determine the correct option, we recall the definition of congruent angles. Congruent angles are defined as angles that have the same measure.

• Option A states they have the same angle measure, which matches the definition.
• Option B: Sharing a side is a property of adjacent angles, not congruent angles.
• Option C: Angles with a sum of \(180^\circ\) are supplementary, not congruent.

Answer:

A. they have the same angle measure.