Polygon Names; Venture beyond the Octagon!

Typically we all know the polygon names up to Hexagon or perhaps Octagon, but what comes next?

Is there actually a name for a 27 sided pentagon?  Yes there is.

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The simple version (and the one most people use) is 27-gon.  But where is the tounge twisting fun in that? Doesn't Icosaheptagon sound so much more interesting?

My son has so much fun with these.  He is only six but he just loves to say the names in between fits of the giggles!

Below, you will find a complete list of Polygon names that are currently in use, and names that have been proposed.

Number of Sides

Name

N

N-gon 

3

Triangle

4

Quadrilateral 

5

Pentagon 

6

Hexagon 

7

Heptagon 

8

Octagon 

10

Decagon

12

Dodecagon 

The following names have been proposed.

9

Nonagon 

11

Undecagon, Hendecagon 

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, Hecatontagon 

1,000

Chiliagon

10,000

Myriagon 

If you enjoyed learning these polygon names, why not explore our Steps to Geometry Success

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