1. POLYGONS BASED ON SIDES

2. TRIANGLE QUADRILATERAL PENTAGON HEXAGON HEPTAGON OCTAGON NONAGAN
NAME OF THE POLYGON
NO. OF SIDES
TRIANGLE 3
QUADRILATERAL 4
PENTAGON 5
HEXAGON 6
HEPTAGON 7
OCTAGON 8
NONAGAN 9
DECAGON 10
HENDECAGON 11
DODECAGON 12

3. Tridecagon or triskaidecagon Tetradecagon or tetrakaidecago
NAME OF THE POLYGON
NO. OF SIDES
Tridecagon or triskaidecagon 13
Tetradecagon or tetrakaidecago 14
Pendedecagon 15
Hexdecagon 16
Heptdecagon 17
Octdecagon 18
Enneadecagon 19
Icosagon 20

4. NAMING POLYGON WITH MORE THAN 12 SIDES
12 sides are simply called an "n-gon," where n is however many sides it has. For example, a polygon with 13 sides can be called a 13-gon; a polygon with 14 sides can be called a 14-gon; and so on. These are proper, technical names for such shapes. There are also Greek-based names for shapes with more than 12 sides (for example, the 13-sided shape could be called the tridecagon; the 14-sided shape could be called the tetradecagon; the 27-sided shape could be called the "icosakaiheptagon" (which literally means "twenty-and-seven corners"), and so on. For large numbers, one simply takes the number as it is spelled out in Greek and adds the suffix "-gon."

5. Test yourself : Find what are these : Equillateral polygon
Equilangular polygon
Regular polygons
Irregular polygons
2. Draw the different types of polygon based on sides