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Measuring Angles with Protractors

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Measuring Angles with Protractors

Measuring Angles with Protractors

Protractor measuring an angle

📐 Part 1: Understanding Your Protractor

1. Circle the correct parts of a protractor:

Baseline (the straight edge at the bottom)

Centre point (where you place the vertex)

Number scale (shows degrees)

All of the above

2. What does a right angle measure?

45°

90°

180°

360°

📏 Part 2: Measuring Practice

3. Look at the angles drawn below. Use your protractor to measure each angle and write the measurement:

Angle A: _______ degrees

This angle is:

Acute (less than 90°)
Right (90°)
Obtuse (more than 90°)

Angle B: _______ degrees

This angle is:

Acute (less than 90°)
Right (90°)
Obtuse (more than 90°)

Angle C: _______ degrees

This angle is:

Acute (less than 90°)
Right (90°)
Obtuse (more than 90°)

🔄 Part 3: Angles and Turns

4. Match the turn with its angle measurement:
1. Quarter turn
2. Half turn
3. Three-quarter turn
4. Full turn
A. 360°
B. 90°
C. 270°
D. 180°
5. Fill in the blanks about turns and angles:

When I turn a quarter turn to the right, I have turned _______ degrees.

A half turn is the same as _______ degrees.

If I make a full turn around, I have turned _______ degrees.

🏫 Part 4: Angles Around Us

6. During our classroom exploration, record the angles you found:

Object 1: _________________________

Angle measurement: _______ degrees

Type of angle: _________________________

Object 2: _________________________

Angle measurement: _______ degrees

Type of angle: _________________________

Object 3: _________________________

Angle measurement: _______ degrees

Type of angle: _________________________

7. Check all the places where you might find right angles (90°) in your classroom:

Corners of books

Corners of tables

Window frames

Door frames

Computer screens

Whiteboard corners

🤔 Part 5: Reflection

8. How confident do you feel using a protractor?

Very confident - I can measure angles easily

Quite confident - I can do it with a little help

Not very confident - I need more practice

I find it difficult and need lots of help

9. Explain in your own words how to measure an angle with a protractor:
10. What was the most interesting angle you found in the classroom today? Why?

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