1. - is a flat surface that extends in all directions. Objective - To identify angles as vertical, adjacent, complementary and supplementary. Plane

2. Parallel Lines A B C D - Lines in the same plane that do not intersect. Intersecting Lines A B C D

3. Vertical Angles- Formed by intersecting lines. Opposite angles (vertical angles) are always congruent. Adjacent Angles-Angels that share a common vertex and side.

4. Complementary Angles a b - Angles whose sum is 90. x y Complementary angles may not be adjacent.

5. Find the measure of the missing angle. x

6. Find the complement of the angle measures below. 1) 20 2) 59 3) 50 4) 62 5) 15 6) 57 7) 43 8) 100 70 31 40 28 75 33 47 Has no complement

7. Supplementary Angles k t - Angles whose sum is 180. bc Supplementary angles may not be adjacent.

8. Find the measure of the missing angle. x y

9. Find the supplement of the following... 1) 18 2) 104 3) 31 4) 75 5) 148 6) 62 7) 159 8) 179 162 76 149 105 32 118 21 1

10. Find the missing angles. 1)2) x y z A D C E B