Shapes with four sides
There are infinite amounts of quadrilaterals that have sides that aren't all equal. In regular quadrilaterals, however there are rectangles and kites that have uneven lengths of sides.
A square is a rectangle in which all side lengths are the same.
Only a square.
There is only one regular quadrilateral, the square. A regular polygon must have equal sides and equal angles, and in the case of quadrilaterals that is a square.
Quadrilaterals are polygons. They can be regular or irregular.
All kites are quadrilaterals, but quadrilaterals are not kites.
All parallelograms are quadrilaterals but all quadrilaterals are not necessarily parallelograms
they have four sides
All 4 sided quadrilaterals are polygons but a square is the only 4 sided regular polygon.
An equilateral parallelopiped, each of whose face is a rhombus.
All quadrilaterals are 4 sided shapes which includes trapezoids.
Not all quadrilaterals are rectangles. Some quadrilaterals are rectangles, and the rest are not. However, all rectangles are quadrilaterals.