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Classification of Angles

Maths: KS3, topic 4.3.1

Classification of angles

Right angle

Right angle

  • A right angle is an angle that measures exactly 90∘90^\circ

  • We often mark it with a small square instead of a curved arc

Acute angle

Acute angle

  • An acute angle is any angle that measures less than 90∘90^\circ
Obtuse angle

Obtuse angle

  • An obtuse angle measures more than 90∘90^\circ but less than 180∘180^\circ

  • It is larger than a right angle but smaller than a straight line

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