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Using Protractors Worksheet

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Using Protractors Worksheet worksheet preview

Using Protractors Worksheet

Protractor and angles illustration

📐 Part 1: Reading Angles

Remember: A protractor has two scales - inner and outer. Always check which scale to use by looking at where your angle starts (0°).

1. What type of angle measures exactly 90°?

Acute angle

Right angle

Obtuse angle

Reflex angle

2. An acute angle measures:

Less than 90°

Exactly 90°

Between 90° and 180°

More than 180°

3. When using a protractor, where should you place the centre point?

At the end of one arm

At the vertex (corner) of the angle

Anywhere on the baseline

At the top of the protractor

4. If an angle measures 45°, what type of angle is it?

Answer: ________________

5. Complete: An obtuse angle measures between ____° and ____°.
6. True or False: A reflex angle is greater than 180°.

True

False

📏 Part 2: Measuring and Drawing Angles

Step-by-step guide for measuring:

1. Place the centre of the protractor on the vertex
2. Align the baseline with one arm of the angle
3. Read where the other arm crosses the scale
4. Choose the correct scale (inner or outer)

7. Draw and label an angle of 60°.
8. Draw and label a right angle.
9. Measure the angle shown below and write your answer.

(Imagine an angle of 120° is drawn here)

The angle measures: ______°

This is a/an _____________ angle.

10. Draw an obtuse angle of 135°.
11. Explain why it's important to check which scale (inner or outer) to use on a protractor.
12. What would happen if you didn't place the centre of the protractor exactly on the vertex?

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