1. Bell Work: Please get your folders!

2. 11-1A Line and Angle Relations

3. An angle has two sides that share a common endpoint called a vertex.
Vocabulary
An angle has two sides that share a common endpoint called a vertex.
Angles are measured in units called degrees.

4. Vocabulary Continued…
If a circle were divided into 360 equal-size parts, each part would have an angle measure of 1 degree.
An angle can be named in several ways. The symbol for angle is .

5. Naming Angles

6. Angles are classified according to their measure.

7. Classify Angles
Classify each angle as acute, obtuse, right, or straight.

8. Check Your Progress
Classify each angle as acute, obtuse, right, or straight.

9. Pairs of angles can also be classified by their relationship.

10. Pairs of Angles

11. Pairs of Angles

12. Classify Angles

13. Check Your Progress

14. Find a Missing Angle Measure

15. 11-1B Parallel Lines

16. Vocabulary Lines in a plane that never intersect are parallel lines.
When two parallel lines are intersected by a third line, this line is called a transversal.
Lines that meet or cross each other to form right angles are perpendicular lines.

17. Transversals and Angles

18. Transversals and Angles

19. Transversals and Angles

20. Classify Angles

21. Check Your Progress

22. Find Measures of Angles

23. Find Measures of Angles

24. Use Angle Relationships

25. Check Your Progress
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26. Check Your Understanding: Rally Coach page 612 #1-6

27. Exit Pass
Summarize the angle relationships that are formed by parallel lines and a transversal. Describe which angles are congruent.