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Measuring Angles

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Measuring Angles worksheet preview

Measuring Angles

Protractor and angles illustration

📐 Part 1: Angle Classification

1. Match each angle measurement to its correct classification:

45°

Right angle

90°

Acute angle

135°

Obtuse angle

180°

Straight angle

2. Which of these angles would be classified as acute? (Select all that apply)

23°

89°

95°

67°

3. A reflex angle measures:

Between 0° and 90°

Between 90° and 180°

Exactly 180°

Between 180° and 360°

📏 Part 2: Using a Protractor

4. List the three key steps for measuring an angle with a protractor:

Step 1: ________________________________

Step 2: ________________________________

Step 3: ________________________________

5. When reading a protractor, explain how you decide which scale to use (inner or outer):
6. Measure the following angles and classify each one:

Note: Your teacher will provide angle diagrams to measure here

Angle A: ______° Classification: _______________

Angle B: ______° Classification: _______________

Angle C: ______° Classification: _______________

🧮 Part 3: Angle Relationships

7. Angles on a straight line add up to ______°
8. If two angles on a straight line measure 75° and x°, find the value of x:

Answer: x = ______°

9. Angles around a point add up to ______°
10. Extension Challenge: Three angles around a point measure 85°, 140°, and y°. Calculate y and verify your answer by measuring:

Calculation: y = ______°

Verification by measurement: y = ______°

11. Real-world Application: Explain one situation where accurate angle measurement is important in everyday life:

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