1. + CHAPTER 2 Section 4: Complementary and Supplementary Angles

2. + Objective: Find the measures of angles formed by intersecting lines. Where would we use this in real life?

3. + Vocabulary… Two angles are ___________________if they are not adjacent and their sides are formed by two intersecting lines. vertical angles 1 2 3 4

4. + Vocabulary… Two adjacent angles are a _____________ _________if their non-common sides are on the same line. A linear pair is TWO angles that form a straight line!!!!!!!! linear pair

5. + A linear pair forms a straight line, which together, they equal 180 degrees.

6. + Linear pair neither adjacent

7. +

8. + Because it is vertical to <1 Because it is vertical to <1

9. + The given angles are vertical angles, so they are congruent. 42 2y