Protractor Worksheets: Drawing Angles - Right, Acute, Obtuse - Answer Key

The task is to draw a second ray on each protractor to create the angle shown, and then label each angle as right, acute, or obtuse. The first one is already done as an example.

Let’s go step by step for each angle:

1. 125° — obtuse
- Already done. It’s greater than 90° but less than 180°, so it’s obtuse.

2. 130° — obtuse
- Draw a ray at 130° from the baseline (starting from 0° on the right side of the protractor).
- Since 130° > 90° and < 180°, it’s obtuse.

3. 45° — acute
- Draw a ray at 45°.
- Since 45° < 90°, it’s acute.

4. 90° — right
- Draw a ray straight up (perpendicular to the baseline).
- Exactly 90° means it’s a right angle.

5. 140° — obtuse
- Draw a ray at 140°.
- Greater than 90°, less than 180° → obtuse.

6. 75° — acute
- Draw a ray at 75°.
- Less than 90° → acute.

7. 90° — right
- Again, draw a vertical ray upward.
- Exactly 90° → right angle.

8. 100° — obtuse
- Draw a ray at 100°.
- Greater than 90°, less than 180° → obtuse.

All labels are already provided in the worksheet — you just need to draw the rays correctly using the protractor and confirm the labels match the angle size.

Final Answer:
Draw each ray at the given degree mark on the protractor. Label them as shown:
- 125° → obtuse (done)
- 130° → obtuse
- 45° → acute
- 90° → right
- 140° → obtuse
- 75° → acute
- 90° → right
- 100° → obtuse