1. Identifying and Measuring Angles
M4M2 Students will understand the
concept of angles and how to measure them.
Essential Question: How are angles measured and identified?

2. Let’s talk angles!
How do we define the following?
Acute angle - an angle that measure less than 90
degrees – think a cute little baby
Obtuse – an angle that measures greater than 90 degrees – think obese
Right – measures exactly 90 degrees
Straight – measures 180 degrees - straight line

3. Let’s take a look at the protractor!

4. Let’s Practice Together!1.
This angle is _______ degrees.
It is a(n) _________ angle.

5. 2.
This angle is _______ degrees.
It is a(n) _________ angle.

6. 3.
This angle is _______ degrees.
It is a(n) _________ angle.

7. 4.
This angle is _______ degrees.
It is a(n) _________ angle.

8. 5.
This angle is _______ degrees.
It is a(n) _________ angle.

9. 6.
This angle is _______ degrees.
It is a(n) _________ angle.

10. Work Session- Time for you to practice
on your own!
First you will identify each angle as either
acute, obtuse, right or straight.
Then you will measure the angle and write
the measurement.

11. Let’s check it!! 1.

12. 2.

13. 3.

14. 4.

15. 5.

16. 6.

17. 7.

18. 8.

19. 9.

20. Closing:
What have we discovered about angles?