The accepted name of a 12-sided polygon is "dodecagon." A polygon is a two-dimensional shape consisting of angles and straight lines in a closed system. The word "polygon" comes from the Greek "poly," which means "many" and "gon," which means "sides."
Know MoreA dodecagon, like all polygons, is made up of of several parts:
The number of diagonals in a polygon can be calculated by the formula 1/2N(N-3), where N is the number of sides. In a dodecagon, the number of diagonals is equal to 1/2(12(12-3), or 54. The sum of all interior angles of a polygon can be calculated by subtracting 2 from the number of sides and multiplying by 180 degrees. The sum of a dodecagon is 1800 degrees.
Polygons that have equal sides and angles are called regular polygons. A regular dodecagon has angles that are 150 degrees each (1800/12). Equiangular polygons have angles that are equal nut not sides. Conversely, equilateral polygons have sides that are equal but not angles.
Learn more about ShapesThe name of a 10-sided polygon is a decagon. The term "decagon" comes from the modern Latin word "decagonum" and from the Greek "dekagonon," which is a combination of "deka," meaning "ten" and "gonia," meaning "corner" or "angle."
Full Answer >The dodecagon is the name of a 12-sided shape. This polygon also has 12 interior angles and 12 vertices. The sum of the interior angles of the dodecagon is 1,800 degrees.
Full Answer >The polygon with 1,000 sides, 1,000 vertices and 1,000 angles is called a chiliagon or a 1,000-gon. The term "chiliagon," with a Greek-derived prefix meaning “thousand,” is a proposed name for the 1,000-sided, two-dimensional shape, but it is seldom used.
Full Answer >A 20-sided polygon is called an icosagon. Along with having 20 sides, all icosagons have 20 interior angles that add up to a total of 3240 degrees.
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