This worksheet helps students learn to identify different types of angles by providing simple definitions and a grid of angles to classify.

Let’s go through each angle one by one and decide if it’s right, acute, or obtuse.

First, remember:
- A right angle looks like the corner of a square — exactly 90 degrees.
- An acute angle is smaller than a right angle — less than 90 degrees.
- An obtuse angle is bigger than a right angle — more than 90 degrees but less than 180.

Now let’s look at each shape:

1. Top left: Looks like an “L” turned sideways — that’s a perfect square corner → right

2. Top middle: The two lines are close together — very narrow → acute

3. Top right: The angle opens wide — wider than a right angle → obtuse

4. Second row, left: Again, looks like a square corner → right

5. Second row, middle: Also looks like a square corner → right

6. Second row, right: Very narrow angle → acute

7. Third row, left: Wide open — bigger than right angle → obtuse

8. Third row, middle: Wide open — bigger than right angle → obtuse

9. Third row, right: Square corner → right

Double-checking:
- Right angles: positions 1, 4, 5, 9 → 4 total
- Acute angles: positions 2, 6 → 2 total
- Obtuse angles: positions 3, 7, 8 → 3 total

All match the definitions.

Final Answer:
right, acute, obtuse, right, right, acute, obtuse, obtuse, right