No. Because tessellation is about using lost (infinitely many) copies of a polygon to cover a surface, One polygon does not comprise a tessellation.
No, it is not because a quadrilateral is generally not a regular polygon.
It is a regular tessellation.
A tessellation that uses more than one kind of regular polygon is called a semi-regular tessellation.
square
regular
polygon Good Luck with
It is an irregular tessellation.
true.. and polygon
It is a regular tessellation.
Semi-regular tessellation
A regular tessellation.