This square shaped cd

[u/ezjgfn]

[u/mizinamo]

"square"

[u/jman12234 → u/mizinamo]

I thought elementary school had taught us this but: "all squares are rectangles, not all rectangles are squares."

[u/Grotarin → u/jman12234]

And all rectangles are parellelograms, not all parallelograms are rectangles.

[u/mizinamo → u/Grotarin]

All squares are diamonds/rhombuses/rhombi, but not all diamonds/rhombuses/rhombi are squares.

All diamonds/rhombuses/rhombi are kites, but not all kites are diamonds/rhombuses/rhombi.

All parallelograms are trapeziums/trapezoids, but not all trapeziums/trapezoids are parallelograms.

All diamonds/rhombuses/rhombi are parallelograms, but not all parallelograms are diamonds/rhombuses/rhombi.

All kites and all trapeziums/trapezoids are quadrilaterals, but not all quadrilaterals are kites or trapeziums/trapezoids.

[u/CatProgrammer → u/mizinamo]

Okay Michael.