12gonal

12gonal is a term used in geometry and mathematics to describe a polygon with twelve sides and twelve angles. The prefix "12-" indicates the number of sides, while the suffix "-gonal" refers to a polygon. A 12-sided polygon is also known as a dodecagon, derived from the Greek words "dodeka" meaning twelve and "gonia" meaning angle. Regular 12gons have all sides and angles equal, while irregular 12gons have sides and angles of different lengths and measures. The interior angles of a regular 12gon can be calculated using the formula (n-2) * 180° / n, where n is the number of sides. For a 12gon, this results in an interior angle of 150°. The exterior angles of a 12gon, which are the angles between one side and the adjacent non-adjacent side, each measure 30°. The area of a regular 12gon can be calculated using the formula (3 * s^2 * √3) / 2, where s is the length of a side. 12gons can be found in various contexts, such as in tiling patterns, architectural designs, and as components in geometric puzzles.