The common name for a hexadecagon is a "16-gon." A hexadecagon is a polygon with sixteen sides and sixteen angles. In geometry, this shape can be regular, where all sides and angles are equal, or irregular. The internal angle of a regular hexadecagon measures 157.5 degrees, and it can be constructed using geometric tools or drawn with precise measurements. Hexadecagons can be encountered in various mathematical contexts, and their properties are studied in geometry. Their complexity and number of sides make them interesting for mathematicians and artists alike in creating intricate patterns and designs.