It is sometimes called a diamond - as in the suit in playing cards, not a jumped-up piece of coal!
Diamond is another name for rhombus.
A rhombus is a 4 sided quadrilateral as is a parallelogram.
A diamond.
A Diamond
I don't use the name "rhombus-quadrilateral", but perhaps the answer to your question is that a rhombus is a special kind of parallelogram
No, a triangle has three sides, a rhombus has 4.
A rhombus
rhombus
The rhombus, rectangle, and square are special types of parallelograms.
A diamond is not a square, but a square is a diamond. A diamond is another name for rhombus.
rhombus
I believe it is Rhombus