1. Warm Up Name an example of: Obtuse, acute, straight, & adjacent ∠ ’s (Be sure to use 3 letters when naming the ∠ ) B H T A M

2. Angle Pair Relationships Supplementary Angles Complementary Angles

3. Two angles that sum to 90° are called complementary angles. Two angles that sum to 180° are called supplementary angles. 33° 57° 64°116°

4. Ex. 1

5. Ex. 2

6. Tear out pages 347 – 350

8. 1)

10. Warm Up Find the measure of ∠ a 1)2)3) a a a 132° 71°

11. Angle Pair Relationships Adjacent Angles Vertical Angles Linear Pair

12. Two angles are adjacent if they share a common vertex and side. B A C Y ∠ CAY is adjacent to ∠ YAB

13. Vertical angles are formed by 2 intersecting lines. They are located opposite of each other. 1 2 3 4  1 and  3 are vertical angles  2 and  4 are vertical angles

14. Theorem: All vertical angles are congruent. 1  2 1 2

15. Two adjacent angles that form a straight line are called a linear pair.  1 and  2 are a linear pair of angles. 1 2 What measure does a linear pair always have to add up to?

16. Ex. 1

17. 1) Find the measure of all missing angles. 72◦

18. 2) Find the measure of all missing angles. 62° 41°

20. (3x – 12)  84  1) Find the value of x.

21. (4x + 5)  xx 2) Find the value of x.

22. 3) Find the value of x. (6x) 

23. 4) Find the value of x. (4x – 53 )  (2x + 27) 