The 'kai' connector is not included by some authors.Įxtending the system up to 999 is expressed with these prefixes the names over 99 no longer correspond to how they are actually expressed in Greek. To construct the name of a polygon with more than 20 and fewer than 100 edges, combine the prefixes as follows. Polygons are primarily named by prefixes from Ancient Greek numbers.Įnglish-Greek numbers English cardinal number The triangle, quadrilateral and nonagon are exceptions, although the regular forms trigon, tetragon, and enneagon are sometimes encountered as well. Hexagon has 6 vertices and 6 angles also. A sphere is a geometrical shape that is a three-dimensional analogue to a two-dimensional circle. Though it has four vertices and edges, all sides of the rectangle aren’t the same. Individual polygons are named (and sometimes classified) according to the number of sides, combining a Greek-derived numerical prefix with the suffix -gon, e.g. In geometry, a hexagon can be defined as a closed two-dimensional polygon with six sides. A rectangle is a four-sided quadrilateral. The word polygon comes from Late Latin polygōnum (a noun), from Greek πολύγωνον ( polygōnon/polugōnon), noun use of neuter of πολύγωνος ( polygōnos/polugōnos, the masculine adjective), meaning 'many-angled'. These segments are called its edges or sides, and the points where two of the edges meet are the polygon's vertices (singular: vertex) or corners.
In geometry, a polygon is traditionally a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain. A regular pentagon has 5 equal edges and 5 equal angles.
