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. 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. They have length, width, height, and depth, allowing you to view the shape from multiple angles. With three-dimensional (3D) shapes, you will notice that they are not confined to a flat surface. Nonagon: For nonagons, you will get nine sides. Still, if you don’t want to intimidate your kids, just allocate five minutes for teaching them the shapes on a daily basis. 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". Fun fact: This shape’s name is derived from the word octo, meaning eight. So, when you are teaching them shapes, keep repeating the shape names and keep showing them pictures of different shapes as it helps them memorize the information. 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.
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