Classifying and Measuring Angles Worksheet for 5th Grade | Lesson ... - Free Printable

To solve the problem of classifying and measuring the angles in the provided image, we need to follow these steps:

Step 1: Understand the Types of Angles

Before measuring, it's important to classify the angles based on their measures:
- Acute Angle: An angle that measures less than 90°.
- Right Angle: An angle that measures exactly 90°.
- Obtuse Angle: An angle that measures more than 90° but less than 180°.
- Straight Angle: An angle that measures exactly 180°.

Step 2: Measure Each Angle

Using a protractor, measure each angle accurately. Here’s how you can do it:
1. Place the center of the protractor at the vertex of the angle.
2. Align one side of the angle with the baseline of the protractor.
3. Read the angle measurement where the other side of the angle intersects the protractor scale.

Step 3: Classify Each Angle Based on Its Measurement

After measuring, classify each angle as acute, right, obtuse, or straight.

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Solution for Each Angle

#### Angle 1:
- Measurement: Approximately 120°
- Classification: Obtuse

#### Angle 2:
- Measurement: Approximately 90°
- Classification: Right

#### Angle 3:
- Measurement: Approximately 180°
- Classification: Straight

#### Angle 4:
- Measurement: Approximately 60°
- Classification: Acute

#### Angle 5:
- Measurement: Approximately 150°
- Classification: Obtuse

#### Angle 6:
- Measurement: Approximately 90°
- Classification: Right

#### Angle 7:
- Measurement: Approximately 45°
- Classification: Acute

#### Angle 8:
- Measurement: Approximately 135°
- Classification: Obtuse

#### Angle 9:
- Measurement: Approximately 90°
- Classification: Right

#### Angle 10:
- Measurement: Approximately 180°
- Classification: Straight

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Final Answer:

Here is the classification and measurement for each angle:

1. 120° (Obtuse)
2. 90° (Right)
3. 180° (Straight)
4. 60° (Acute)
5. 150° (Obtuse)
6. 90° (Right)
7. 45° (Acute)
8. 135° (Obtuse)
9. 90° (Right)
10. 180° (Straight)

Boxed Final Answer:
\[
\boxed{
\begin{array}{ll}
1. & 120^\circ \text{ (Obtuse)} \\
2. & 90^\circ \text{ (Right)} \\
3. & 180^\circ \text{ (Straight)} \\
4. & 60^\circ \text{ (Acute)} \\
5. & 150^\circ \text{ (Obtuse)} \\
6. & 90^\circ \text{ (Right)} \\
7. & 45^\circ \text{ (Acute)} \\
8. & 135^\circ \text{ (Obtuse)} \\
9. & 90^\circ \text{ (Right)} \\
10. & 180^\circ \text{ (Straight)}
\end{array}
}
\]