Grade 4 Geometry Worksheet for measuring angles using a protractor.

The task involves measuring the angles shown in the worksheet using a protractor. Below is a step-by-step explanation of how to measure angles using a protractor, followed by an example solution for one of the angles.

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Steps to Measure Angles Using a Protractor:

1. Identify the Vertex and Arms of the Angle:
- The vertex is the point where the two arms (lines) of the angle meet.
- One arm will be the baseline, and the other will extend to form the angle.

2. Place the Protractor:
- Align the center of the protractor with the vertex of the angle.
- Ensure that one arm of the angle lies along the baseline of the protractor (usually the straight horizontal line at the bottom).

3. Read the Angle:
- Look at the scale on the protractor that starts from 0° along the baseline.
- Follow the second arm of the angle to see where it intersects the protractor's scale.
- Read the degree measurement at this intersection.

4. Check the Direction:
- If the angle opens to the right, use the outer scale of the protractor.
- If the angle opens to the left, use the inner scale of the protractor.

5. Record the Measurement:
- Write down the measured angle in degrees.

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Example Solution for One Angle:

Let’s solve the first angle (Angle 1) as an example:

#### Step 1: Identify the Vertex and Arms
- The vertex is the point where the two lines meet.
- One arm is the horizontal line, and the other arm extends upward to form the angle.

#### Step 2: Place the Protractor
- Place the center of the protractor exactly on the vertex.
- Align the baseline of the protractor with the horizontal arm of the angle.

#### Step 3: Read the Angle
- Follow the second arm (the one extending upward) to see where it intersects the protractor's scale.
- If the angle opens to the right, read the outer scale.
- Suppose the second arm intersects the protractor at 70°.

#### Step 4: Record the Measurement
- The measured angle is 70°.

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General Notes for All Angles:

- Repeat the same steps for each angle in the worksheet.
- Be careful to align the protractor correctly and choose the correct scale (inner or outer) based on the direction the angle opens.
- Double-check your measurements to ensure accuracy.

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Final Answer:

Since the exact measurements are not provided in the image, the final answer would involve measuring each angle individually using the steps above. For Angle 1, the solution is:

\[
\boxed{70^\circ}
\]

Repeat this process for all nine angles to complete the worksheet.