Types of Angles

An angle is the size of the arc between 2 lines. Angles are measured in degrees.

Angles are used to measure either the amount of turn or rotation an object makes OR the size of the internal angles within plane shapes.

Types of angles are defined by the size of the angle between the 2 lines.
Common types of angles are shown below.

Tip: When it comes to remembering the difference between Acute, Obtuse and Reflex angles think about the alphabet: A comes before O and after comes R; the size of the angles increase.


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