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 More
A 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 in Shapes
A nine-sided polygon is called a nonagon. Another name for a nine-sided polygon is enneagon. The general accepted names are "n-gon" where n is the number of the sides of the polygon.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 polygon with three sides is called a triangle. All triangles consist of three lines that are not collinear and three angles. Polygons can have any number of sides, but they must be closed figures.Full Answer >