1. Objectives: -Identify and use the Parallel Postulate and the Triangle Sum Theorem Warm-Up: Position one letter in each of the five openings. Do this in such a manner that three numbers are spelled out that total thirteen. Words may be written clockwise and counterclockwise, and individual letters may be shared.

2. The Parallel Postulate: Given a line and a point not on the line, there is one and only one line that contains the given point and is parallel to the given line.

3. The Triangle Sum Theorem:

4. Exterior Angle Theorem:

5. Example: Two angle measures are given. Find the missing angle measure or state that the triangle does not exist.

6. Example: A D B E F C

7. Find the indicated angle measure. 1 2 3

8. Example: Find x and the measure of each angle. C A B

9. Example: Find x and the measure of each angle. C A B

10. Example: Find x and the measure of each angle. C A B

11. Example: Refer to the diagram below to complete the table. 2 3 14

12. Objectives: -Identify and use Triangle Sum Theorem with algebraic scenarios that require factoring. Warm-Up: Travel through this maze totaling exactly 100 points. No passage or intersection may be used more than once. Enter and exit the maze at the designated arrows.

13. Factoring / Zero Product Property Review:

15. Example: Find x and the measure of each angle. Z W Y

16. Example: Find x and the measure of each angle. C A B

17. Example: Find x and the measure of each angle. F D E

18. Example: Find x and the measure of each angle. C A B

19. Example: Find x and the measure of each angle. F D E