1-360
(1-180 in a traiangle)
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acute angles are angles that are smaller than 90 degrees. all acute angles are all angles that are less than 90degrees
All angles between 180 and 360 degrees are reflex angles.
All angles of a rectangle are 90 degrees.
In all parallelograms, opposite angles are equal and the 4 interior angles add up to 360 degrees. In someparallelograms, all of the angles are 90 degrees. These parallelograms are rectangles.
If all angles aren't 90 degrees, then it's a rhombus.If all angles are 90 degrees, then it's a square.