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How Do You Name Polygons?

Published in Geometry 1 min read

Polygons are named based on the number of sides (or angles) they possess.

While the provided reference only mentioned polygons with 3 to 10 sides, let's create a more comprehensive table for naming polygons.

Number of Sides Prefix Polygon Name
3 Tri- Triangle
4 Tetra- / Quad- Quadrilateral
5 Penta- Pentagon
6 Hexa- Hexagon
7 Hepta- Heptagon
8 Octa- Octagon
9 Nona- Nonagon
10 Deca- Decagon
11 Undeca- / Hendeca- Undecagon/Hendecagon
12 Dodeca- Dodecagon
13 Trideca- Tridecagon
14 Tetradeca- Tetradecagon
15 Pentadeca- Pentadecagon
16 Hexadeca- Hexadecagon
17 Heptadeca- Heptadecagon
18 Octadecagon- Octadecagon
19 Enneadecagon- Enneadecagon
20 Icosa- Icosagon
n n-gon n-gon

For polygons with a large number of sides, you can use the generic term "n-gon", where 'n' represents the number of sides. For example, a polygon with 47 sides would be called a 47-gon.

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