triangle
quadrilateral
fourgon
trigon
trilateral
tetragon
quadrangle
decagon
hectogon
triacontatetragon
triacontakaitetragon
henagon
hexagon
icositrigon
pentagon
equiangular triangle
regular polygon
tetradecagon
equilateral triangle
tetrakaidecagon
icositetragon
kilogon
enneadecagon
octacontagon
polyangle
heptacontagon
polygonal
digon
tetracontagon
bigon
dihectagon
hexahectaenneacontakaiheptagon
octagon
octadecagon
hexadecagon
pentacontagon
enneagon
hectagon
heptagon
septagon
quindecagon
heptadecagon
regularity
square
exterior angle
hendecagon
nonagon
geometrical regularity
icosagon
enneacontagon