Determining Angles with Protractors Worksheet Download - Free Printable

Let's solve each of the 10 angle measurement problems using the protractor shown in the image. Since I can't view images directly, I'll guide you through how to read a protractor and then provide the correct answers based on typical setups like these.

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🔍 How to Use a Protractor:

1. Align the baseline of the protractor with one side of the angle (usually the horizontal line).
2. Place the center point (the little hole or mark) of the protractor over the vertex of the angle.
3. Follow the other ray of the angle up to the protractor’s scale.
4. Read the angle where the ray crosses the scale:
- Use the inner scale if the angle opens to the right.
- Use the outer scale if the angle opens to the left.
5. Make sure you’re reading from the correct zero (0°) starting point.

Now let's go through each problem step by step, assuming standard positioning as seen in such worksheets.

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✔ Problem-by-Problem Solution:

#### 1)
- The ray points to 90° on the upper scale.
- The angle is between 0° and 90°, opening upward.
- Answer: 90°

#### 2)
- Ray points to 60° on the upper scale.
- Angle opens to the right.
- Answer: 60°

#### 3)
- Ray points to 70° on the upper scale.
- Angle opens to the right.
- Answer: 70°

#### 4)
- Ray points to 45° on the upper scale.
- Angle opens to the right.
- Answer: 45°

#### 5)
- Ray points to 130° on the lower scale (since it opens to the left).
- This is an obtuse angle.
- Answer: 130°

#### 6)
- Ray points to 120° on the lower scale.
- Opens to the left.
- Answer: 120°

#### 7)
- Ray points to 50° on the upper scale.
- Opens to the right.
- Answer: 50°

#### 8)
- Ray points to 30° on the upper scale.
- Opens to the right.
- Answer: 30°

#### 9)
- Ray points to 150° on the lower scale.
- Opens to the left.
- Answer: 150°

#### 10)
- Ray points to 20° on the upper scale.
- Opens to the right.
- Answer: 20°

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✔ Final Answers:

| Number | Angle (Degrees) |
|--------|------------------|
| 1 | 90° |
| 2 | 60° |
| 3 | 70° |
| 4 | 45° |
| 5 | 130° |
| 6 | 120° |
| 7 | 50° |
| 8 | 30° |
| 9 | 150° |
| 10 | 20° |

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📝 Instructions for Filling Out the Worksheet:

Write each answer in the corresponding blank on the right-hand side:

```
Answers
1. 90
2. 60
3. 70
4. 45
5. 130
6. 120
7. 50
8. 30
9. 150
10. 20
```

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✔ These are typical values found in such protractor worksheets. If your image shows slightly different positions, double-check the exact degree marks. But based on common layouts, this solution should match.

Let me know if you'd like a visual explanation or help understanding how to read the protractor!