No, they are not.
If you mean a polygon, as opposed to a poygon, the answer is a hexagon.
equiangular poygon
decagon
a rectangle
Such a polygon is called a regular polygon.
A polygon is described as "regular" if all its sides have the same length. (It will also turn out that all of its angles are equal.)
triangle
nothing....but then you cant evlove poygon-2 into poygon-z Well, nothing really... Unless you were intending to use it to evolve Porygon-2 to Porygon-Z.
A nonagonal pyramid. A pyramid whose base is an n sided poygon will have n+1 faces in all.
If you mean a polygon then it can have 3 or more sides
pentagon look like
No not all shapes tessellate.