Identifying and Classifying Angles

Name: _______________________________
Date: _______________________________

Instructions: Classify each angle as acute (0°–90°), right (90°), obtuse (90°–180°), straight (180°), or reflex (180°–360°).

Part A: Classify these angles by their measure

1. 45° __________________________
2. 90° __________________________
3. 135° __________________________
4. 180° __________________________
5. 210° __________________________
6. 75° __________________________
7. 320° __________________________
8. 160° __________________________

Part B: Classify the angles shown below

9. ___________________
10. ___________________
11. ___________________
12. ___________________
13. ___________________
14. ___________________

Part C: True or False

15. An obtuse angle measures less than 90°. _____________
16. A reflex angle is greater than 180°. _____________
17. A right angle measures exactly 90°. _____________
18. An acute angle can measure 95°. _____________