1. Special Angle Pairs

2. Definitions Adjacent Angles: Angles that have a common ray or side and a common vertex, but points inside either one of the angles are not inside the other. A B C Z is adjacent to

3. Types of Angles Vertical Angles: congruent angles formed by intersecting lines or line segments.

4. Types of Angles What are the vertical angles in this figure? A B C D E

5. Example Find the value of the variable. A B C D E

6. Example Find the value of the variable. A B C D E

7. Example Find the value of the variable. A B C D E

8. Example Find the value of the variables. A B C D E

9. Types of Angles A B D E P Q R S T U are nonadjacent complementary angles

10. BC D E A R T B L M They would also be called a linear pair because they form a straight line