A _____ tessellation is a tessellation that uses only one regular polygon to cover a surface completely.A.semi-completeB.completeC.semi-regularD.regular

The correct answer is D. regular.

Explanation:

A regular tessellation is defined as a pattern that covers a plane using only one type of regular polygon arranged in a repeating pattern. The angles of the polygons meet at a single point, creating a uniform look across the covered surface. For instance, a regular tessellation can use equilateral triangles, squares, or regular hexagons.

In contrast, semi-regular tessellations involve two or more types of regular polygons. Complete tessellations usually refer to covering a surface completely, but in the context of using only one type of polygon, the specific term is "regular."

Thus, the most appropriate choice for a tessellation that solely employs one regular polygon is option D, "regular."