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![Supplementary Angles Definition Supplementary Angles Definition](http://doversherborn.comcastbiz.net/highschool/academics/math/baroody/GeometryHonors/Class%20Notes/Chapter%202/Lesson2-2/supplementary.gif)
Either of two angles that added together produce an angle of 180°. SLAY JABBERWOCKY WITH THIS NO-NONSENSE WORD OF THE DAY QUIZ.
Or like this: ∠BJust by the vertex, so long as it is not ambiguous. So in the figure above the angle could also be called simply' ∠B'Measure of an angleThe size of an angle is measured in degrees (see ). When we say 'the angle ABC' we mean the actual angle object.If we want to talk about the size, or measure, of the angle in degrees, we should say 'the measure of the angle ABC' - often written m ∠ABC.However, many times we will see ' ∠ABC=34°'. Strictly speaking this is an error. It should say 'm ∠ABC=34°'Types of angleAltogether, there are six types of angle as listed below.
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