there are about a million quadrilaterals (this was done by Rosey Floopingager I know its a weird name but my parents gave it to me and I enjoy it!!)
A quadrilateral has 4 sides
A quadrilateral has 2 diagonals.
A quadrilateral need not have any vertical sides.
A Quadrilateral has two diagonals. IF the quadrilateral is a rectangle, then the two diagonals are equal in length.
There are 4 interior angles in a quadrilateral
A quadrilateral has 4 line segments
A quadrilateral has 4 sides.
4
the same as a regular quadrilateral, 4
number of sides of a quadrilateral= 4
All trapezoids must be quadrilateral. And, as the name suggests a quadrilateral has four sides.
Infinitely many points are contained within a non-degenerate quadrilateral.