11 Undecagon, Hendecagon
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
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Oh, dude, you're really making me work here, huh? Alright, let's see... so we've got an 11-sided polygon, which is called a hendecagon. Then we've got a dodecagon with 12 sides, a tridecagon with 13 sides, a tetradecagon with 14 sides, a pentadecagon with 15 sides, a hexadecagon with 16 sides, a heptadecagon with 17 sides, an octadecagon with 18 sides, an enneadecagon with 19 sides, and finally, a 20-sided polygon, which is called an icosagon. Like, hope that helps or whatever.
Sure thing, honey! Here's the rundown: an 11-sided polygon is called a hendecagon, a 12-sided polygon is a dodecagon, a 13-sided polygon is a tridecagon, a 14-sided polygon is a tetradecagon, a 15-sided polygon is a pentadecagon, a 16-sided polygon is a hexadecagon, a 17-sided polygon is a heptadecagon, an 18-sided polygon is an octadecagon, a 19-sided polygon is an enneadecagon, and a 20-sided polygon is an icosagon. Hope that clears things up for ya!
Sure! Here are the names of polygons with 11 to 20 sides:
11 sides: Undecagon 12 sides: Dodecagon 13 sides: Tridecagon or Triskaidecagon 14 sides: Tetradecagon 15 sides: Pentadecagon 16 sides: Hexadecagon 17 sides: Heptadecagon 18 sides: Octadecagon 19 sides: Enneadecagon 20 sides: Icosagon
Hendecagon
Dodecagon
Tridecagion
Teteradecagon
Pentadecagon
Hexadecagon
Heptadecagon
Octadecagon
Enneadecagon
Icosagon
3 sides: triangle 4 sides: quadrilateral 5 sides:pentagon 6 sides:hexagon 7 sides: heptagom 8 sides: octagon 9 sides: nonagon 10 sides: decagon 11 sides: unodecagon ? 12 sides: duodecagon 13 sides: trisca-decagon? 14 sides: ( I am tired on making up names- try quator-decagon, or look it up.)
Endecagon or hendecagon.An undecagon has 11 sides
An hendecagon is an 11 sided polygon
Hendecagon has 11 sides,dodecagon has 12 sides,triskaidecagon has 13 sides,tetradecagon has 14 sides,pentadecagon has 15 sides,hexadecagon has 16 sides,17 sides is heptadecagon,octadecagon have 18 sides,enneadecagon has 19 sides,20 sides is called as icosagon. The prefix of that 9 polygons is Greek. A polygone with 4 sides is called a quadrilateral.
All polygons, including an undecagon (11-sided figure) have a sum of exterior angles of 360 degrees.