What Is A 17, 18,19 And 20 Sided Shape Called?

5 Answers

Elizabeth Leake Profile
Elizabeth Leake answered
The names of the sided shapes as mentioned above are as follows:
  • 17 sided shape
A 17 sided shape is called a heptadecagon or a heptakaidecagon. This is part of the polygon shapes.

  • 18 sided shape
An 18 sided shape is called an octadecagon (octa meaning 8 and decagon meaning 10)

  • 19 sided shape
A 19 sided shape is called an enneadecagon (pronounced en-ee-deck-uh-gon)

  • 20 sided shape
A 20 sided shape is called an icsoagon.

All of these shapes are from the polygon family. A polygon simply means that it is a shape that is bounded by a closed path or circuit, which is made up of a sequence of straight lines or edges. Each polygon is named after the amount of sides it has as seen above.

Other examples of this are:

A 30 sided shape is called  a triocontagon
A 100 sided shape is called a hectogon
A 1000 sided shaped is called a chilliagon
These polygons are named right up to a million sided shape which is called a megagon and an apeirogon which is a degenerate polygon with infinite sides.
A lot of the names of the shapes are derived from Greek including the word polygon itself which translated means many corners or angles.
amber Jhon Profile
amber Jhon answered
Welcome to Blurtit!

Basically all of these are polygons and they have different names depending upon the number of the sides. A polygon with 17 sides is known as Heptadecagon or Heptakaidecagon, polygon with 18 sides is known as Octadecagon or Octakaidecagon, polygon with 19 sides is called Enneadecagon or Enneakaidecagon and a polygon with 20 sides is named as Icosagon. I hope this information will work for you.

Have fun and keep enjoying Blurtit!

thanked the writer.
Anonymous commented
Amber22, thank you SO much! Now I need to find out what a 13 and 34 shaped polygon is called...
Benjamin Porter
Benjamin Porter commented
Thank you for telling me what a 17 , 18,19and 20 sided shape is called
Anonymous Profile
Anonymous answered

A nineteen sided shape is called nonadecagon

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