1. Proving Statements about Angles
Section 2-6
Proving Statements about Angles

2. Angle congruence is reflexive, symmetric, and transitive.

3. Right angle congruence theorem
All right angles are congruent

4. Congruent supplements theorem
If two angles are supplementary to the same angle (or congruent angles), then the two angles are congruent.

5. By Congruent Supplements Thm!2 1 3
By Congruent Supplements Thm!

6. Congruent complements theorem
If two angles are complementary to the same angle (or congruent angles), then the two angles are congruent.

7. By Congruent complements Thm!5 6 4
By Congruent complements Thm!

8. Linear pair postulate
If two angles form a linear pair, then they are supplementary.

9. 1 2

10. Vertical angles theorem
Vertical angles are congruent

11. 2 4 3 1