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Angle classification worksheet for identifying types of angles.

Worksheet titled "Angle Classification 2" with nine angles to classify as right, acute, obtuse, reflex, or straight.

Worksheet titled "Angle Classification 2" with nine angles to classify as right, acute, obtuse, reflex, or straight.

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Show Answer Key & Explanations Step-by-step solution for: Angle types worksheet with answers | PDF
Let's solve the Angle Classification 2 worksheet step by step.

We are asked to classify each angle as right, acute, obtuse, reflex, or straight, based on its measure.

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🔷 Definitions:


- Acute angle: Less than 90°
- Right angle: Exactly 90° (forms a square corner)
- Obtuse angle: Greater than 90° but less than 180°
- Straight angle: Exactly 180° (a straight line)
- Reflex angle: Greater than 180° but less than 360°

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Now, let’s analyze each of the 12 angles in the grid:

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🟦 Row 1:


1. First angle (top-left):
- Looks like it's greater than 90° but less than 180° → Obtuse

2. Second angle:
- Smaller than 90° → Acute

3. Third angle:
- Has a small square symbol → Right

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🟦 Row 2:


4. Fourth angle:
- Less than 90° → Acute

5. Fifth angle:
- The arc is at the outer side and looks like it's more than 180° → Reflex

6. Sixth angle:
- Angle appears greater than 90° but less than 180° → Obtuse

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🟦 Row 3:


7. Seventh angle:
- Very narrow, less than 90° → Acute

8. Eighth angle:
- The angle is very small, less than 90° → Acute

9. Ninth angle:
- Looks like it's less than 90° → Acute

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🟦 Row 4:


10. Tenth angle:
- Greater than 90° but less than 180° → Obtuse

11. Eleventh angle:
- The curved arc shows an angle greater than 180° → Reflex

12. Twelfth angle:
- Looks like it's exactly 180° (a straight line) → Straight

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Final Answers:



| Angle | Classification |
|-------|----------------|
| 1 | Obtuse |
| 2 | Acute |
| 3 | Right |
| 4 | Acute |
| 5 | Reflex |
| 6 | Obtuse |
| 7 | Acute |
| 8 | Acute |
| 9 | Acute |
| 10 | Obtuse |
| 11 | Reflex |
| 12 | Straight |

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📝 Summary:


You can now fill in the blanks under each angle with:
1. Obtuse
2. Acute
3. Right
4. Acute
5. Reflex
6. Obtuse
7. Acute
8. Acute
9. Acute
10. Obtuse
11. Reflex
12. Straight

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Parent Tip: Review the logic above to help your child master the concept of obtuse angle worksheet.
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