The name of a 51 sided polygon is Pentaconhenagon.
The name of a 52 sided polygon is Pentacondigon.
The name of a 53 sided polygon is Pentacontrigon.
The name of a 54 sided polygon is Pentacontetragon.
The name of a 55 sided polygon is Pentaconpentagon.
The name of a 56 sided polygon is Pentaconheptagon.
The name of a 57 sided polygon is Pentaconhexagon.
The name of a 58 sided polygon is Pentaconoctagon.
The name of a 59 sided polygon is Pentaconenneagon.
A 51 SIDED SHAPE IS A PENTACONHENAGON
A 52 SIDED SHAPE IS A PENTACONDIGON
A 53 SIDED SHAPE IS A PENTAGONTRIGON
A 54 SIDED SHHAPE IS A PENTATETRAGON
A 55 SIDED SHAPE IS A PENTAPENTAGON
A 56 SIDED SHAPE IS A PENTAHEXAGON
A 57 SIDED SHAPE IS A PENTAHEPTAGON
A 58 SIDED SHAPE IS A PENTAOCTAGON
A 59 SIDED SHAPE IS A PENTAENNAEGON
name of 4000 sided polygon
That would depend on what A sided polygon it is.
The name of a 100 sided polygon is Hectogon.
The name of a 14 sided polygon is Tetradecagon.
The name of a 200 sided polygon is dihectagon.
The name of a 18 sided polygon is Octadecagon.
The name of a 8 sided polygon is Octagon.
The name of a 20 sided polygon is Icosagon.
The name of a 395 sided polygon is trictoeneapentagon.
The name of a 600 sided polygon is Hexcosiagon.
The name of a 200 sided polygon is dihectagon.
The name of a 19 sided polygon is enneadecagon.