Parallelograms are quadrilaterals
There are three types of parallelograms.
Rectangles are equiangular.
This is all linked with parallelograms
that have oppposite sides
which happens to be parallel.
Oh what a freakin' suprise.
All of them you will hear:
rectangle, rhombus, oh yeah,
we can't forget the square.
Rhombuses equilateral, ooh.
Squares are just a little more special.
They have both properties of the two.
which are quadrilaterals you see.
Parallelograms aren't the only ones,
just one of the three.