> only hexagons and rectangles (or, more accurately, parallelograms) can tile a flat plane.
That's not true. There are a lot of pentagons that can do the same thing (google Marjorie Rice for details). Also, there are more quadrangles that also can tile a plane.
> only hexagons and rectangles (or, more accurately, parallelograms) can tile a flat plane.
That's not true. There are a lot of pentagons that can do the same thing (google Marjorie Rice for details). Also, there are more quadrangles that also can tile a plane.