1. 4.6 Warm Up  Do #5-8 on pg. 220

2. 4.6 (M1) Properties of Special Angles

3. Vocabulary/Properties  Adjacent angles: share a common vertex and side and don’t overlap  Linear Pair: 2 adjacent angles that together form a straight line  All right angles are congruent

4.  If 2 angles are supplementary to the same angle, then they are congruent  If 2 angles are complementary to the same angle, then they are congruent

5. Vocabulary/Properties  If 2 angles form a linear pair, they are supplementary. (Linear Pair Postulate)  Vertical angles are congruent. Opposite angles when you have intersecting linesOpposite angles when you have intersecting lines

6. EXAMPLE 4 Standardized Test Practice SOLUTION Because TPQ and QPR form a linear pair, the sum of their measures is 180. The correct answer is B. ANSWER

7. GUIDED PRACTICE for Example 4 7. Solve for x. Use the diagram in Example 4. x = 49 ANSWER

8. GUIDED PRACTICE for Example 4 8. Find m TPS. Use the diagram in Example 4. m TPS = 148° ANSWER