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

Let’s go step by step to classify each angle as acute, obtuse, or right.

First, remember:

- Acute angle = less than 90° (looks sharp, like a slice of pizza)
- Right angle = exactly 90° (like the corner of a square or book)
- Obtuse angle = more than 90° but less than 180° (wide open, like a recliner chair)

Now let’s look at each one:

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1. The angle is small — definitely less than 90° → Acute

2. This angle is wide open — bigger than 90° → Obtuse

3. Also very wide — looks like it’s almost straight but not quite → Obtuse

4. Again, wider than a right angle → Obtuse

5. Very wide — clearly over 90° → Obtuse

6. Small and sharp → Acute

7. Looks like a typical acute angle — under 90° → Acute

8. Very narrow — still under 90° → Acute

9. Wide open — greater than 90° → Obtuse

Wait — let me double-check #9. It’s drawn with two lines forming an angle that opens widely — yes, definitely obtuse.

Also check if any are *exactly* 90°? None of them have the little square symbol for right angles, and none visually look like perfect corners. So no right angles here.

But wait — let’s re-examine #1, #6, #7, #8 — all acute.
#2, #3, #4, #5, #9 — all obtuse.

Is there any chance one is right? Let’s imagine holding a piece of paper corner up to each — none match perfectly. So we’re safe.

Final classification:

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

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