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A linear pair is formed when two adjacent angles have their non-common side in opposite rays. Their measures will always add up to 180 degrees. Vertival angles are formed by two intersecting lines. Two pairs are formed; they are across from each other (not adjacent), and are congruent.
The vertical angles are congruent, so two pairs of angles and a pair of. non-included sides are congruent. The triangles are congruent by the. AAS Congruence Theorem. b. There is not enough information to prove the triangles are congruent, because no sides are known to be congruent. c. Two pairs of angles and their included sides are congruent. The triangles. are congruent by the ASA Congruence Postulate. FLOW PROOFS You have written two-column proofs and paragraph proofs.