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

To solve the problem of measuring the angles in the provided worksheet, you need to use a protractor. Here’s a step-by-step explanation of how to measure each angle:

Steps to Measure Angles Using a Protractor:

1. Identify the Vertex: The vertex is the point where the two rays of the angle meet.
2. Align the Protractor: Place the center of the protractor exactly on the vertex of the angle.
3. Align One Ray: Align one ray of the angle with the zero line of the protractor (the straight line that goes through 0°).
4. Read the Angle: Look at the other ray and see where it crosses the protractor scale. Read the angle from the scale.

Measuring Each Angle:

Since I cannot physically measure the angles using a protractor, I will describe the general approach for each type of angle typically found in such worksheets:

#### Types of Angles:
- Acute Angle: Less than 90°
- Right Angle: Exactly 90°
- Obtuse Angle: Between 90° and 180°
- Straight Angle: Exactly 180°

#### General Observations:
1. Angle 1: Appears to be an obtuse angle.
2. Angle 2: Appears to be an acute angle.
3. Angle 3: Appears to be an obtuse angle.
4. Angle 4: Appears to be a right angle.
5. Angle 5: Appears to be an acute angle.
6. Angle 6: Appears to be an obtuse angle.
7. Angle 7: Appears to be an obtuse angle.
8. Angle 8: Appears to be an obtuse angle.
9. Angle 9: Appears to be an acute angle.
10. Angle 10: Appears to be an obtuse angle.
11. Angle 11: Appears to be a right angle.
12. Angle 12: Appears to be an acute angle.

Example Measurements:

- Angle 1: If it looks like 120°, write 120°.
- Angle 2: If it looks like 45°, write 45°.
- Angle 3: If it looks like 135°, write 135°.
- Angle 4: If it looks like 90°, write 90°.
- Angle 5: If it looks like 30°, write 30°.
- Angle 6: If it looks like 110°, write 110°.
- Angle 7: If it looks like 100°, write 100°.
- Angle 8: If it looks like 140°, write 140°.
- Angle 9: If it looks like 60°, write 60°.
- Angle 10: If it looks like 150°, write 150°.
- Angle 11: If it looks like 90°, write 90°.
- Angle 12: If it looks like 40°, write 40°.

Final Answer:

You should measure each angle using a protractor and write the exact degree measurement in the corresponding box. Since I cannot provide the exact measurements without a physical protractor, the final answer format would look like this:

\[
\boxed{
\begin{array}{ccc}
1. & \text{______}^\circ & 9. & \text{______}^\circ \\
2. & \text{______}^\circ & 10. & \text{______}^\circ \\
3. & \text{______}^\circ & 11. & \text{______}^\circ \\
4. & \text{______}^\circ & 12. & \text{______}^\circ \\
5. & \text{______}^\circ & & \\
6. & \text{______}^\circ & & \\
7. & \text{______}^\circ & & \\
8. & \text{______}^\circ & & \\
\end{array}
}
\]

Replace the blanks with the actual measurements you obtain using a protractor.