2D Shapes

No. of Sides
Name
2
Digon
3
Triangle (Trigon)
4
Quadrilateral (Tetragon)
5
Pentagon
6
Hexagon
7
Heptagon (Septagon)
8
Octagon
9
Nonagon (Enneagon)
10
Decagon
11
Hendecagon (Undercagon)
12
Dodecagon
13
Tridecagon (Triskaidecagon)
14
Tetradecagon (Tetrakaidecagon)
15
Pentadecagon (Pentakaidecagon)
16
Hexadecagon (Hexakaidecagon)
17
Heptadecagon (Heptakaidecagon)
18
Octadecagon (Octakaidecagon)
19
Enneadecagon (Enneakaidecagon)
20
Icosagon
30
Triacontagon
40
Tetracontagon
50
Pentacontagon
60
Hexacontagon
70
Heptacontagon
80
Octacontagon
90
Enneacontagon
100
Hectogon
1000
Chiliagon
10,000
Myriagon


Using any of the following words you can work out the name of any sided shape with up to a ten thousand sides. For example: a kidney bean shaped pond, with shelfs around the sides that had 26 faces would be called an Irregular Hexa-Icosagon.

Remember: An irregular shape that does not have equal inside angles must be called an irregular, then the name of the shape.




______________________________________________________
Edward Holmes, SMC @ CCMS, shapemakingclub@btconnect.com