• Sides
    		 Name
    n
    		 N-gon
    3
    		 Triangle
    4
    		 Quadrilateral
    5
    		 Pentagon
    6
    		 Hexagon
    7
    		 Heptagon
    8
    		 Octagon
    10
    		 Decagon
    12
    		 Dodecagon

    Names for other polygons have been proposed.

    Sides
    		 Name
    9
    		 Nonagon, Enneagon
    11
    		 Undecagon, Hendecagon
    13
    		 Tridecagon, Triskaidecagon
    14
    		 Tetradecagon, Tetrakaidecagon
    15
    		 Pentadecagon, Pentakaidecagon
    16
    		 Hexadecagon, Hexakaidecagon
    17
    		 Heptadecagon, Heptakaidecagon
    18
    		 Octadecagon, Octakaidecagon
    19
    		 Enneadecagon, Enneakaidecagon
    20
    		 Icosagon
    30
    		 Triacontagon
    40
    		 Tetracontagon
    50
    		 Pentacontagon
    60
    		 Hexacontagon
    70
    		 Heptacontagon
    80
    		 Octacontagon
    90
    		 Enneacontagon
    100
    		 Hectogon, Hecatontagon
    1,000
    		 Chiliagon
    10,000
    		 Myriagon

    To construct a name, combine the prefix+suffix

    Sides
    		 Prefix
    20
    		 Icosikai...
    30
    		 Triacontakai...
    40
    		 Tetracontakai...
    50
    		 Pentacontakai...
    60
    		 Hexacontakai...
    70
    		 Heptacontakai...
    80
    		 Octacontakai...
    90
    		 Enneacontakai...
    +
    Sides
    		 Suffix
    +1
    		 ...henagon
    +2
    		 ...digon
    +3
    		 ...trigon
    +4
    		 ...tetragon
    +5
    		 ...pentagon
    +6
    		 ...hexagon
    +7
    		 ...heptagon
    +8
    		 ...octagon
    +9
    		 ...enneagon

    Examples:
    46 sided polygon - Tetracontakaihexagon

    28 sided polygon - Icosikaioctagon

    However, many people use the form n-gon, as in 46-gon, or 28-gon instead of these names.