Definition: An angle
whose measure is greater than 90° and less than 180°
Adjust the angle
below by dragging the orange dot at A and see how the angle ∠
Note that it is obtuse for all angles greater than 90° and less than 180°
Not to be confused with an obtuse triangle which has one obtuse interior angle.
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.
Other angle topics
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