It is a tessellation consisting of triangles, squares and hexagons, in the configuration 126.96.36.199, which is shown in figure 8. Irregular tessellations Irregular tessellations are those that are formed by irregular polygons, or by regular polygons but that do not meet the criterion that a node is a vertex of at least three polygons. Example 7. Tessellation Shapes Regular tessellationsA Regular tessellations are tile patterns made up of one single shape placed in some kind of pattern. There are three types of regular tessellations: triangles, squares and hexagons. Semi-Regular TessellationA When two or three types of polygons share a common vertex, a semi-regular tessellation is formed.A.