Reflex angle
Definition: An angle whose measure is greater than 180° and less than 360°
Try this
Adjust the angle below by dragging an orange dot and see how the angle ∠ABC behaves.
Note that it is a reflex angle only when it is between 180° and a full circle.
Some might argue than reflex angles are not real. They are the 'other half' of a smaller angle.
Indeed if you refer to the angle ∠ABC without qualifying it,it is generally assumed that you mean the
smallest angle. If you mean the large part of the angle, you must specify it by saying 'reflex angle ∠ABC'.
Types of angle
Altogether, there are six types of angle as listed below. Click on an image for a full description of that type and a corresponding interactive applet.
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Other angle topics
General
Angle Types
Angle relationships
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