Measuring Angles with a Protractor - Worksheet | Maths Year 5 - Free Printable

I will solve this worksheet by measuring the angles in Part 1 and selecting the most likely measurements for the angles in Part 2. I'll start with Part 1.

Part 1: Measure the angles below

For each angle, I need to read the protractor correctly. The key is to align the baseline of the protractor with one side of the angle and read the scale where the other side intersects.

- Angle a): The angle opens from the right side (0°) towards the left. The red line points to 30° on the inner scale.
- Angle b): This is a right angle, so it should be 90°. The red line points exactly at 90°.
- Angle c): The angle opens from the right side (0°) towards the left. The red line points to 80° on the inner scale.
- Angle d): The angle opens from the right side (0°) towards the left. The red line points to 20° on the inner scale.
- Angle e): The angle opens from the right side (0°) towards the left. The red line points to 70° on the inner scale.
- Angle f): The angle opens from the right side (0°) towards the left. The red line points to 40° on the inner scale.

Part 2: Circle the measurement that is the most likely for the angles below

- Angle a): This is an acute angle (less than 90°). Among the options (130°, 30°, 90°), 30° is the only acute angle, so it's the most likely.
- Angle b): This is an obtuse angle (greater than 90° but less than 180°). Among the options (95°, 180°, 70°), 95° is the only obtuse angle, so it's the most likely.
- Angle c): This is an acute angle (less than 90°). Among the options (85°, 250°, 110°), 85° is the only acute angle, so it's the most likely.

Now I will provide the final answers.

Final Answers:

Part 1:
a) 30°
b) 90°
c) 80°
d) 20°
e) 70°
f) 40°

Part 2:
a) 30°
b) 95°
c) 85°