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