No, some may
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No you can have one right angle and the others not right angles and still be and irregular quadralateral
There can be 4 different acute angles in an irregular 4 sided quadrilateral that all add up to 360 degrees.
A rectangle or square.
This is a rectangle.
A square or rectangle.
No because a quadrilateral has 4 sides but doesn't have to have right angles. For example the. Trapezoid doesn't,t have right angles but it is a quadrilateral