Measuring angles using a Protractor Worksheets|Grade 5 - Free Printable

Explanation:
To solve this task, you need to measure each angle using a protractor. Here’s how to do it step by step:

1. Place the center of the protractor (the small hole or mark) exactly on the vertex (the point where the two lines meet) of the angle.
2. Line up one of the angle’s rays (the straight lines) with the zero line on the protractor. This is usually the bottom line of the protractor.
3. Look at the other ray of the angle and see where it crosses the numbers on the protractor. That number is the size of the angle in degrees (°).
4. Make sure you are reading the correct scale. If the angle opens to the right, use the outer scale. If it opens to the left, use the inner scale.

Now, let’s go through each angle:

1. This angle opens to the right. The ray goes from the vertex to the right, and the other ray goes up and left. When you line it up, the other ray crosses at about 120°.
2. This angle opens to the right. The ray goes from the vertex to the right, and the other ray goes up and left. It looks like it’s about 70°.
3. This angle opens to the right. The ray goes from the vertex to the right, and the other ray goes up and left. It looks like it’s about 60°.
4. This angle has a small square at the vertex. That means it is a right angle, which is always 90°.
5. This angle opens to the right. The ray goes from the vertex to the right, and the other ray goes up and left. It looks like it’s about 45°.
6. This angle opens to the right. The ray goes from the vertex to the right, and the other ray goes up and left. It looks like it’s about 90°.
7. This angle opens to the left. The ray goes from the vertex to the left, and the other ray goes up and right. It looks like it’s about 135°.
8. This angle opens to the left. The ray goes from the vertex to the left, and the other ray goes up and right. It looks like it’s about 45°.
9. This angle opens to the right. The ray goes from the vertex to the right, and the other ray goes up and left. It looks like it’s about 70°.
10. This angle opens to the right. The ray goes from the vertex to the right, and the other ray goes up and left. It looks like it’s about 130°.
11. This angle has a small square at the vertex. That means it is a right angle, which is always 90°.
12. This angle opens to the right. The ray goes from the vertex to the right, and the other ray goes up and left. It looks like it’s about 60°.

Final Answer:
1. 120°
2. 70°
3. 60°
4. 90°
5. 45°
6. 90°
7. 135°
8. 45°
9. 70°
10. 130°
11. 90°
12. 60°