Types of Angle
Maths: Year 3 & 4 National Curriculum, topic 3.1.2
Types of Angles
Angles can be grouped depending on how big they are. Groups of angles have different names:
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Acute angles
- An acute angle is smaller than 90°.
Right angles
- A right-angle is a 90° angle.
- You can show a right-angle with a small square in the angle.
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Obtuse angles
- An obtuse angle is bigger than 90° but smaller than 180°.
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Reflex angles
- A reflex angle is bigger than 180°.
Test yourself on Types of Angle
What type of angle is this?