The correct response is:
Since the sum of angle measures in a triangle is 180°, the third angle pair must have the same measure and are thus congruent. Because all three corresponding interior angles of the triangle are congruent, the triangles are similar by the definition of similarity.
This answer correctly uses the property that the angles in a triangle sum to 180°, leading to the conclusion that if two angles are congruent, the third angle must also be congruent, establishing similarity based on the Angle-Angle (AA) similarity criterion.