Polygon Names; Venture beyond the Octagon!

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

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

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 inbetween 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

 

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 for polygons have been proposed.

 

 

9

Nonagon, Enneagon

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

1000

Chiliagon

10,000

Myriagon

 

 

 

 


You may also enjoy a tour of our Steps to Geometry Success area.


Don't forget to tour our other K6 Math Areas, which you can access through our Home Page


Our Printable Math Worksheets Library is always open and ready for use! No membership required!