1. Acute Angle
2. Right Angle
3. Obtuse Angle
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They are named for the number of sides and angles their shape posses. For example, an octagon has both eight sides and angles.
I am not aware of any other names that take in all its characteristics. It is a parallelogram but that does not reuire its angles to be 90 degreesl etc.
equal angle
There are infinitely many polygons so it would be impossible to name them all. For the names of those with a fewer sides see the related link.
Classifications by side length or comparison of angles and sides:scalene - no sides or angles equalisosceles - two sides and angles equal (congruent)equilateral - all sides and angles equal (all 60° angles)Classifications by included angles :right triangle - contains a 90° angle (right angle)oblique triangle - has no right angleacute triangle - contains all angles less than 90°obtuse triangle - contains one angle greater than 90°