# Tessellation

## Tiling of a plane in mathematics / From Wikipedia, the free encyclopedia

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A **tessellation** or **tiling** is the covering of a surface, often a plane, using one or more geometric shapes, called *tiles*, with no overlaps and no gaps. In mathematics, tessellation can be generalized to higher dimensions and a variety of geometries.

A **periodic tiling** has a repeating pattern. Some special kinds include *regular tilings* with regular polygonal tiles all of the same shape, and *semiregular tilings* with regular tiles of more than one shape and with every corner identically arranged. The patterns formed by periodic tilings can be categorized into 17 wallpaper groups. A tiling that lacks a repeating pattern is called "non-periodic". An *aperiodic tiling* uses a small set of tile shapes that cannot form a repeating pattern (an aperiodic set of prototiles). A *tessellation of space*, also known as a space filling or honeycomb, can be defined in the geometry of higher dimensions.

A real physical tessellation is a tiling made of materials such as cemented ceramic squares or hexagons. Such tilings may be decorative patterns, or may have functions such as providing durable and water-resistant pavement, floor, or wall coverings. Historically, tessellations were used in Ancient Rome and in Islamic art such as in the Moroccan architecture and decorative geometric tiling of the Alhambra palace. In the twentieth century, the work of M. C. Escher often made use of tessellations, both in ordinary Euclidean geometry and in hyperbolic geometry, for artistic effect. Tessellations are sometimes employed for decorative effect in quilting. Tessellations form a class of patterns in nature, for example in the arrays of hexagonal cells found in honeycombs.