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 explanation accurately reflects that in any triangle, the sum of the interior angles is always 180 degrees. If two angles of one triangle are congruent to two angles of another triangle, then the third angles must also be congruent, leading to all three angles being congruent. According to the Angle-Angle (AA) criterion for triangle similarity, this means the triangles are similar.