Answer to Question #19910 in Abstract Algebra for lelsie

Question

number of sides of polygons

Answer 1

A geometrical figure with three or more sides is called a polygon or a polyhedron. Here are the names for some polygons.

3 triangle, trigon
4 quadrilateral, tetragon
5 pentagon
6 hexagon
7 heptagon
8 octagon
9 nonagon, enneagon
10 decagon
11 hendecagon
12 dodecagon, duodecagon
13 triskaidecagon, tridecagon
14 tetrakaidecagon, tetradecagon
15 pentadecagon
16 hexadecagon
17 heptadecagon
18 octadecagon
19 enneadecagon
20 icosagon