A polygon with 21 sides is therefore called a: Icosikaihenagon, but also a Icosihenagon.
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Also know, what do you call a polygon with 20 sides?
In geometry, an icosagon or 20-gon is a twenty-sided polygon. The sum of any icosagon's interior angles is 3240 degrees.
Similarly, what is a shape with 69 sides called? In geometry, a hendecagon (also undecagon or endecagon) or 11-gon is an eleven-sided polygon.
Secondly, what is the name of a 22 sided polygon?
| # | Name of the Polygon + Geometric Drawing |
|---|---|
| 11 sides | hendecagon |
| 12 sides | dodecagon |
| 13 sides | tridecagon |
| 14 sides | tetradecagon |
What is a 21 Gon?
21 sides angle sum is 180(21-2) = 180*19 = 3420. each angle in a regular 21-gon will be 3420/21 = 162.8571429 degrees (apprrox)
Related Question AnswersWhat is a 9999 sided shape called?
What do you call a 9999-sided polygon? A nonanonacontanonactanonaliagon.What is a 3 sided shape called?
A 3-sided shape is called a triangle. Triangles are polygons with three sides, so any polygon with three sides is called a triangle.What is a 19 sided polygon?
In geometry an enneadecagon or 19-gon is a nineteen-sided polygon. It is also known as an enneakaidecagon or a nonadecagon.What is a 72 sided polygon called?
pentagon. 5. 3π/5 = 108° 2π/5 = 72° 6 - sided polygon.Is a circle a polygon?
Polygons. A polygon is a closed plane figure with three or more sides that are all straight. The following figure is not a polygon as it is not a closed figure. A circle is not a polygon as it does not have straight sides.What is another name for a polygon?
Names of Polygons| Name | Sides | Interior Angle |
|---|---|---|
| Heptagon (or Septagon) | 7 | 128.571° |
| Octagon | 8 | 135° |
| Nonagon (or Enneagon) | 9 | 140° |
| Decagon | 10 | 144° |
What is a 2 sided shape called?
Digon. In geometry, a digon is a polygon with two sides (edges) and two vertices. Its construction is degenerate in a Euclidean plane because either the two sides would coincide or one or both would have to be curved; however, it can be easily visualised in elliptic space.What is a 1 sided shape called?
There is no polygon with one side, because the definition of a polygon is "a 2-dimensional closed shape". The minimum number of sides which can close the figure is 3.. One side: a line which is one dimensional. A circle can also does not be considered as a one-sided polygon, because it does not consist of line segmentsWhat do you call a 15 sided polygon?
Properties. Convex, cyclic, equilateral, isogonal, isotoxal. In geometry, a pentadecagon or pentakaidecagon or 15-gon is a fifteen-sided polygon.What is a 96 sided shape called?
In geometry, an enneacontahexagon or enneacontakaihexagon or 96-gon is a ninety-six-sided polygon.What is a 1000000 sided shape called?
A megagon or 1 000 000-gon is a polygon with 1 million sides (mega-, from the Greek μέγας megas, meaning "great"). Even if drawn at the size of the Earth, a regular megagon would be very difficult to distinguish from a circle.What do you call a 40 sided polygon?
In geometry, a tetracontagon or tessaracontagon is a forty-sided polygon or 40-gon.What is the name of a 27 sided polygon?
Systematic polygon names| Ones | Twenties | |
|---|---|---|
| 6 | hexa- | 26 |
| 7 | hepta- | 27 |
| 8 | octa- | 28 |
| 9 | ennea- | 29 |
