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The naming convention for regular tessellations (as well as for semiregular and demiregular tessellations) requires knowledge of how to name polygons around vertices. The following subsection will explain this topic. Afterwards, we will finally give names to our three regular tessellations. How to Name an Arrangement of Regular Polygons Around a Vertex
Consider the first arrangement shown in the figure. Since 3 is the lowest number of sides, we start from the triangle and proceed clockwise or counterclockwise around the vertex. Either way we go, we obtain a square, a hexagon, and another square. Putting the number of sides of each polygon in sequence, we obtain: 3.4.6.4. Consider the second arrangement. Three is the lowest number of sides. There are two adjacent triangles in the arrangement, and there are no other longer consecutive runs of equilateral triangles. Thus, we start from the two adjacent triangles and go clockwise or counterclockwise around the vertex. Either way, we obtain: 3.3.4.3.4. Consider the third arrangement. Even though there are two adjacent octagons, we must start with the polygon with the lowest number of sides: the square. Thus, proceeding clockwise or counterclockwise from the square, we obtain: 4.8.8.
Finally, let us now consider our regular tessellations:
The polygon arrangement around each vertex in the regular tessellation of equilateral triangles is the same: 3.3.3.3.3.3. Similarly, the arrangment for the regular tessellation of squares is 4.4.4.4, and the arrangment for the regular tessellation of hexagons is 6.6.6. Since this information is enough to distinguish between the regular tessellations and since it is also enough to reconstruct the original tessellation, we identify the regular tessellations as 3.3.3.3.3.3, 4.4.4.4, and 6.6.6.
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