centagonal

Centagonal refers to something having the shape of a pentagon, a polygon with five sides and five angles. This term is commonly used in geometry to describe shapes and figures. For example, a centagonal prism would be a prism with pentagonal bases. A centagonal pyramid would have a pentagonal base and triangular faces meeting at an apex.

In crystallography, the term can appear in discussions of crystal systems. While pentagons themselves do not tile the plane without gaps, certain arrangements or symmetries can exhibit centagonal characteristics. For instance, some molecular structures or quasicrystals might display five-fold symmetry, which is related to the centagonal form.

The concept of centagonal figures is also found in various art and design contexts, where pentagonal shapes are used for their aesthetic properties. The regular pentagon, with its equal sides and angles, is a common and recognizable centagonal figure. The word itself derives from the Greek word "pente," meaning five, and "gonia," meaning corner or angle.