what is a tessellation
A tessellation is defined as a pattern of shapes that fit together perfectly. A brick wall is a tessellation. See more here: http://www.mathsisfun.com/geometry/tessellation.html.
Tessellation is a mathematical term describing a pattern that is created by identical shapes that fit together and leave no gaps. Tessellation can also only occur when the shapes creating the pattern do not overlap.
Tessellation is the repetetion of geometrical shapes without gaps to create a plane of two dimensions. Tessellations can be noted from ancient to modern art.