Answer:
(a) 3⁴.6
Explanation:
You want to name the semi-regular tessellation shown in the figure.
Naming
A tessellation is named by choosing a vertex and listing the numbers of sides of the polygons that meet there. As the attachment shows, each vertex is a meeting place for 4 triangles and a hexagon. The naming starts with the polygon having the least number of sides.
It can be named ...
3.3.3.3.6 or 3⁴.6
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Additional comment
A semi-regular tessellation is made of two or more regular polygons. The pattern must be the same at each vertex.