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Measuring Angles with Protractors

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Measuring Angles with Protractors

Protractor and angles illustration

📐 Part 1: Angle Types and Benchmarks

1. Match each angle type to its correct degree range:

Acute angle: ________________ degrees

Right angle: ________________ degrees

Obtuse angle: ________________ degrees

Straight angle: ________________ degrees

Reflex angle: ________________ degrees

2. Circle the benchmark angles that help us measure:

45°

90°

120°

180°

270°

360°

3. A full turn around a circle equals:

90°

180°

270°

360°

4. What fraction of a full circle is a right angle (90°)?

1/2

1/3

1/4

1/8

📏 Part 2: Using a Protractor

5. List the 4 steps for measuring an angle with a protractor:
Step 1: _________________________________________________
Step 2: _________________________________________________
Step 3: _________________________________________________
Step 4: _________________________________________________
6. You measure an angle and get 125°. This angle is:

Acute

Right

Obtuse

Straight

Reflex

7. Drawing Activity: In the space below, draw and label these angles using a protractor:

a) Draw a 45° acute angle

b) Draw a 135° obtuse angle

c) Draw a 270° reflex angle

🎯 Part 3: Problem Solving

8. If you turn 1/2 of a full circle, how many degrees have you turned? Show your working:
9. Extension Challenge: Two angles are complementary (they add up to 90°). If one angle is 35°, what is the other angle?
10. Real-world Connection: Name two places where you might see or use angles in everyday life:
11. Reflection: Complete this sentence:

Today I learned that angles are part of the metric system because ________________________________

_________________________________________________________________________________

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