Types of Polygons

Convex Polygons

Convex Polygon

All of its angles are less than 180°.

All of the diagonals are internal.

Concave Polygons

Concave Polygon
 At least one angle measures more than 180°.
 At least one of the diagonals is outside the shape of the polygon.

 

Equilateral Polygons

Equilateral Polygon
All sides are equal.

 

Equiangular Polygons

Equiangular Polygon
All angles are equal.

 

Regular Polygons

Regular Polygon
They have equal angles and sides

 

Irregular Polygons

Irregular PolygonThey do not have equal angles and sides.


Types of Polygons based on Number of Sides

Triangle

Triangle
3 sides.

 

Quadrilateral

Quadrilateral
4 sides.

 

Pentagon

Pentagon
5 sides.

 

Hexagon

Hexagon
6 sides.

 

Heptagon

Heptagon
7 sides.

 

Octagon

Octagon
8 sides.

 

Enneagon or Nonagon

Enneagon
9 sides.

 

Decagon

Decagon
10 sides.

 

Hendecagon

Hendecagon
11 sides.

 

Dodecagon

Dodecagon
12 sides.

 

Tridecagon or triskaidecagon

Tridecagon
13 sides.

 

Tetradecagon or tetrakaidecago

Tetradecagon
14 sides.

 

Pendedecagon

Pendedecagon
15 sides.

 

Hexdecagon

Hexdecagon
16 sides.

 

Heptdecagon

Heptdecagon
17 sides.

 

Octdecagon

Octdecagon
18 sides.

 

Enneadecagon

Enneadecagon
19 sides.

 

Icosagon

Icosagon
20 sides.

 




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