1. © M. Tallman

2. When you line up a piece of paper with the vertex of the angle, you can see that it lines up. This angle is right and/or 90º. vertex Right Angle- an angle formed when two perpendicular lines meet or cross.

3. © M. Tallman When you line up a piece of paper with the vertex of the angle, you can see that that angle is smaller. This angle is acute. Acute Angle- an angle that is less than a right angle (less than 90º). vertex

4. © M. Tallman When you line up a piece of paper with the vertex of the angle, you can see that that angle is larger. This angle is abtuse. Obtuse Angle- an angle that is greater than a right angle (greater than 90º). vertex

5. © M. Tallman Classify the angles: acute, right, or obtuse.

6. Classify the angles: acute, right, or obtuse.

7. © M. Tallman Classify the angles: acute, right, or obtuse.

8. © M. Tallman Classify the angles: acute, right, or obtuse.

9. © M. Tallman Classify the angles: acute, right, or obtuse.

10. © M. Tallman Classify the angles: acute, right, or obtuse.

11. © M. Tallman Classify the angles: acute, right, or obtuse.

12. © M. Tallman Classify the angles: acute, right, or obtuse.

13. © M. Tallman Classify the angles: acute, right, or obtuse.

14. © M. Tallman Angles are measured in degrees. 90º ¼ Turn

15. Angles are measured in degrees. 90º ¼ Turn 180º ½ Turn

16. © M. Tallman Angles are measured in degrees. 180º ½ Turn 270º ¾ Turn

17. © M. Tallman Angles are measured in degrees. 270º ¾ Turn 360º 1 Full Turn

18. © M. Tallman Identify the degree and related “turn” of the angle. 180º ½ Turn

19. 360º 1 Full Turn Identify the degree and related “turn” of the angle.

20. © M. Tallman 90º ¼ Turn Identify the degree and related “turn” of the angle.

21. © M. Tallman 270º ¾ Turn Identify the degree and related “turn” of the angle.

22. © M. Tallman 90º ¼ Turn Identify the degree and related “turn” of the angle.

23. © M. Tallman Identify the degree and related “turn” of the angle. 180º ½ Turn

24. © M. Tallman 270º ¾ Turn Identify the degree and related “turn” of the angle.

25. © M. Tallman 360º 1 Full Turn Identify the degree and related “turn” of the angle.