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Maths

Angles - Foundation

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Different types of angle

For your exam, you will need to know the following types of angle:

image: an angle

Any angle that is less than 90° is called an acute angle.

image: an angle

Any angle which is between 90° and 180° is called an obtuse angle.

image: an angle

Any angle that is between 180° and 360° is called a reflex angle.

You also need to remember that the angles in a triangle add up to 180°, and that the angles in a quadrilateral add up to 360°.

image: traingle and trapezium

p + q + r = 180°         w + x + y + Z = 360°

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