There is no specific name. Irregular is not enough because a rectangle is irregular.
a Trapezoid
A parallelogram.
You call it a parallelogram.
Well, you are supposed to call an irregular quadrilateral an IRREGULAR QUADRILATERAL. Haha. There really isn't any name for a regular quadrilateral. You just call it a quadrilateral or whatever the shape is. You could call it a REGULAR QUADRILATERAL.
A trapezium (US trapezoid).
i think you call it a irregular quadrilateral
Quadrilaterals usually have special names only if they DO have parallel sides, or some other special property. You might just call it "quadrilateral", or "a quadrilateral with no parallel sides".
a Trapezoid
A parallelogram.
You call it a parallelogram.
Parallelogram
Well, you are supposed to call an irregular quadrilateral an IRREGULAR QUADRILATERAL. Haha. There really isn't any name for a regular quadrilateral. You just call it a quadrilateral or whatever the shape is. You could call it a REGULAR QUADRILATERAL.
A trapezium (US trapezoid).
A quadrilateral is a polygon with 4 sides. ... Definition: A parallelogram is a quadrilateral where both pairs of opposite sides are parallel. We use the symbol to represent a parallelogram.
a square or rectangular are the first things that came to my mind
A parallelogram. Example of parallelogram is a square, a rectangle, and a rhombus.
A square.