1. p. 114: 23 – 28

2. Given Transitive prop. congruence Definition of congruence Given 5. 5. Transitive prop. Equality/Substitution

3. Given Definition of complementary angles Given Congruent Complements Theorem

4. Given Definition of linear pair Linear pair postulate Congruent supplements theorem

5. Given Vertical angles congruence thm Transitive prop of congruence

6. Linear pair postulate tells us that a linear pair sums to 180 degrees

7. Vertical angle congruence theorem states that vertical angles are congruent. This means that they have the same angle measure.