Obtuse angle
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There is no special name for a 120º angle.
Each interior angle of a regular hexagon measures 120 degrees. It has a total of 720 degrees of interior angles and a total of 360 degrees of exterior angles.
A 120 degree angle is an obtuse angle. This means that the angle is between 90 and 180 degrees.
Any triangle that has an angle measuring 90 degrees is a right triangle.
acute-angled triangle