Measuring angles worksheet for Grade 4 students using a protractor.

Explanation:
To measure an angle using a protractor, follow these steps:

1. Place the center point (the small hole or mark) of the protractor exactly on the vertex (the point where the two lines meet) of the angle.
2. Align one side of the angle with the zero line on the protractor. This is usually the straight edge at the bottom.
3. Look at the other side of the angle and see where it crosses the numbers on the protractor.
4. Read the number where the second line crosses the scale. Be careful to use the correct scale—start from 0 on the side that you aligned with the zero line.

For example, if the angle opens to the right, use the outer scale. If it opens to the left, use the inner scale.

Important: Always double-check your alignment. The protractor must be centered and one side must be on the zero line.

Now, for each angle in the worksheet, follow these steps:
- Place the protractor on the vertex.
- Line up one ray with 0°.
- Read the degree where the other ray crosses the protractor.

Since the worksheet has 9 angles, each one must be measured individually using this method. The answer will be the degree measure for each angle.

Final Answer:
The answer depends on measuring each angle with a protractor. Since this is a worksheet, the correct answers are the actual measurements taken for each angle. You must use a physical protractor to measure each angle and record the degree value. There is no single numerical answer without measuring.