12. Whatever number you say before '-gon' is referring to the number of sides in the shape. However, 12-gon (or 20-gon, or whatever) is not the official name of any polygon but is commonly used. the commonly used name is a do-decagon
n-gon
Pentadecagon actually, no, it is called a fifteen-gon, or fifteen-a-gon. anything more than 12(dodecagon) the name of the polygon is just the number of sides, and "gon" at the end.
any shape after 12 sides is just called the number sides - gon. for example: 97 is a 97-gon (pronounced: ninety seven gon). this works for any other number sides except 3,4,5,6,7,8,9,10,12. further examples are 11-gon, 15-gon, 47-gon, 101, gon... these go up until the angle measure of any regular polygon is exactly 180 degrees or as close as possible (179.99999...) making it a circle.
3 sides = Triangle 4 sides = Quadrilateral 5 sides = Pentagon 6 sides = Hexagon 7 sides = Heptagon 8 sides = Octagon 9 sides = Nonagon 10 sides = Decagon. 12 sides = Dodecagon any other number after these or a shape with 11 sides .. you use the number of sides and put "gon" after.. for example if you have 13 sides. you would put 13-gon
A 12-gon has 12 sides.
12. Whatever number you say before '-gon' is referring to the number of sides in the shape. However, 12-gon (or 20-gon, or whatever) is not the official name of any polygon but is commonly used. the commonly used name is a do-decagon
A 16-gon. You only name polygons up to a dodecagon (12 sides), excluding the 11-gon. After that, they are named by their number of sides with the suffix "-gon". Ex: 16 sides: 16-gon.
Dodecagon Dodeca = 12, gon = sides
n-gon
17-gon - After the dodecagon (12 sided polygon), there is usually just n-gon, where n is the number of sides the polygon has.
17-gon - After the dodecagon (12 sided polygon), there is usually just n-gon, where n is the number of sides the polygon has.
There is no limit on how big a name for a polygon is. Typically after Dodecagon (12 sides) the polygons are referred to as an n-gon, where n is referring to the number of sides on the polygon. A Myrigon is a 10,000-gon , a Megagon is a 1,000,000-gon, a Googolgon is a 1 * 10^100-gon
the answer to this question is simple. any shape with more than 10 sides with two exceptions is the number of sides then gon. example: 12 sides= 12-gon, 13 sides=13-gon , etc.
3 sides= triangle 4 sides= quadrilateral 5 sides= pentagon 6 sides= hexagon 7 sides= heptagon 8 sides= octagon 9 sides= nonagon 10 sides= decagon 11 sides= hendecagon 12 sides= dodecagon 13 sides= tridecagon/13-gon 14 sides= tetradecagon/14-gon 15 sides= pentadecagon/15-gon 16 sides= hexadecagon/16-gon 17 sides= heptadecagon/17-gon 18 sides= octadecagon/18-gon 19 sides= enneadecagon/19-gon 20 sides= icosagon/20-gon 30 sides= triacontagon/30-gon 40 sides= tetracontagon/40-gon 50 sides= pentacontagon/50-gon 60 sides= hexacontagon/60-gon 70 sides= heptacontagon/70-gon 80 sides= octcontagon/80-gon 90 sides= nonacontagon/90-gon 100 sides= hectagon/100-gon 1,000 sides= chiliagon/1,000-gon 10,000 sides= myriagon/10,000-gon 100,000 sides= decimyriagon/100,000-gon 1,000,000 sides= hecatommyriagon/1,000,000-gon Since there are infinitely many polygons, it is impossible to list the names of all of them.
Your question is wrong because it has 12 sides and 54 diagonals
Dodeka. (in Greek)