Only a square.
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.
In regular quadrilaterals, it's length times width.
Not all irregular quadrilaterals share the same properties; however, they all have four sides and angles that are not equal or do not have equal lengths. Irregular quadrilaterals can have varying side lengths and angles, distinguishing them from regular quadrilaterals like squares or rectangles. Examples include trapezoids and general quadrilaterals that do not conform to specific classifications.
There are always 2 diagonals in any quadrilateral whether or not it is irregular or regular
An equilateral parallelopiped, each of whose face is a rhombus.
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.
Shapes with four sides
they have 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.
Most non-regular quadrilaterals.
In regular quadrilaterals, it's length times width.
A square is a rectangle in which all side lengths are the same.
Quadrilaterals and Triangles, if you're asking for polygon categories.
There are always 2 diagonals in any quadrilateral whether or not it is irregular or regular
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.