Classify angles as acute, obtuse, or right in this Grade 5 geometry worksheet.

To classify each angle, we need to remember the definitions:

- Acute angle: Less than 90 degrees (looks “sharp” or narrow).
- Right angle: Exactly 90 degrees (looks like the corner of a square — often marked with a small square).
- Obtuse angle: More than 90 degrees but less than 180 degrees (looks “wide” or open).

Now let’s go one by one:

1. The first angle looks wide — definitely more than 90°. → Obtuse

2. This one is also wide — bigger than a right angle. → Obtuse

3. Same as #2 — clearly wider than 90°. → Obtuse

4. Again, this opens up more than a right angle. → Obtuse

5. This one is very wide — almost flat, but not quite 180°. Still over 90°. → Obtuse

6. This one is narrow — smaller than a right angle. → Acute

7. Also narrow — looks like it’s less than 90°. → Acute

8. Very narrow — definitely acute. → Acute

9. This one is wide — more than 90°, but not straight. → Obtuse

Double-checking:
Angles 1–5 and 9 are obtuse.
Angles 6–8 are acute.
None are right angles (no 90° corners shown).

Final Answer:
1. Obtuse
2. Obtuse
3. Obtuse
4. Obtuse
5. Obtuse
6. Acute
7. Acute
8. Acute
9. Obtuse