Work Step by Step
This diagram shows that two sides of each triangle are marked congruent. Two angles are marked as right angles, and right angles are congruent. Another angle in one triangle is congruent to another angle in the other triangle because they are vertical angles, and vertical angles are congruent. We now have two consecutive angles congruent one another and one non-included side congruent; therefore, we can prove that these triangles are congruent because of the AAS postulate.