1. Measure and classify angles.
Identify and use congruent angles and the bisector of an angle.
Splash Screen

2. Mathematical Practices 5 Use appropriate tools strategically.
Content Standards
G.CO.1 Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.
G.CO.12 Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.).
Mathematical Practices
5 Use appropriate tools strategically.
6 Attend to precision.
CCSS

3. ray degree right angle acute angle opposite rays angle obtuse angle
angle bisector
opposite rays
angle
side
vertex
interior
exterior
Vocabulary

4. Vocabulary

5. Vocabulary

6. A. Name all angles that have B as a vertex.
Angles and Their Parts
A. Name all angles that have B as a vertex.
Example 1

7. Angles and Their Parts
B. Name the sides of 5.
Example 1

8. Angles and Their Parts C.
Example 1

9. A.
Example 1a

10. B.
Example 1b

11. Which of the following is another name for 3?
Example 1c

12. Vocabulary

13. Concept

14. A. Measure TYV and classify it as right, acute, or obtuse.
Measure and Classify Angles
A. Measure TYV and classify it as right, acute, or obtuse.
Example 2

15. Measure and Classify Angles
Example 2

16. Measure and Classify Angles
Example 2

17. A. Measure CZD and classify it as right, acute, or obtuse.
Example 2a

18. B. Measure CZE and classify it as right, acute, or obtuse.
Example 2b

19. C. Measure DZX and classify it as right, acute, or obtuse.
Example 2c

20. Example 3

21. Measure and Classify Angles
INTERIOR DESIGN Wall stickers of standard shapes are often used to provide a stimulating environment for a young child’s room. A five-pointed star sticker is shown with vertices labeled. Find mGBH and mHCI if GBH  HCI, mGBH = 2x + 5, and mHCI = 3x – 10.
Example 3

22. Find mBHC and mDJE if BHC  DJE, mBHC = 4x + 5, and mDJE = 3x + 30.
Example 3

23. Homework
Page 41 (12-36) / Page 42 (37-42)
CCSS