Class 5 (CBSE) • MathematicsChapter 3: Angles as Turns⭐ Topic 2
Measuring Angles
We learn to measure angles accurately using a protractor, understanding degrees as the unit of angle measurement.
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Know it
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See the pattern
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Try it out
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Fun picture
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Learn the idea step by step
1
Know it
A protractor is a tool with degree markings from 0 to 180, used to measure the size of an angle accurately.
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See the pattern
To measure an angle, we place the protractor's centre point on the angle's vertex (corner point), align the base line with one side of the angle, and read the degree where the other side crosses.
Quick revision
Remember these!
- A protractor measures angles in degrees.
- Protractors have markings from 0 to 180 degrees.
- We place the centre point on the angle's vertex.
- We align the base line with one side of the angle.
- We read the degree where the other side crosses.
- Practice builds measuring accuracy.
- This is an important geometry skill.
- Angle measurement is useful in construction and design.
Words to know
measuring angles