1. Determining Angle Measures of Intersecting Lines CC.7.G.5 Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem to write and solve simple equations for an unknown angle in a figure.

2. Warm Up Use the figure to answer the following: 1 2 3 4 5 Do <1 and <2 form a linear pair? Do <4 and <5 form a linear pair? Do <5 and <3 form vertical angles? Do <1 and <3 form vertical angles? Are <1 and <5 complementary angles? Are <2 and <3 supplementary angles? Are <5 and <4 complementary angles?

3. Video http://www.khanacademy.org/math/geometr y-1/core-geometry/v/angles-at-the- intersection-of-two-lines http://www.khanacademy.org/math/geometr y-1/core-geometry/v/angles-at-the- intersection-of-two-lines

4. Directions: Determine the missing angle.

5. #1 45º?º?º

6. #1 45º135º

7. #2 65º ?º?º

8. #2 65º 25º

9. #3 35º ?º?º

10. #3 35º

11. #4 50º ?º?º

12. #4 50º 130º

13. #5 140º ?º?º

14. #5 140º

15. #6 40º ?º?º

16. #6 40º 50º