Wallpaper
group
Triangle
symmetry
Extended
symmetry
Extended
diagram
Extended
group
Honeycombs
p3m1 (*333) a1 [3[3]] (none)
p6m (*632) i2 [[3[3]]] ↔ [6,3] 1, 2
p31m (3*3) g3 [3+[3[3]]] ↔ [6,3+] (none)
p6 (632) r6 [3[3[3]]]+ ↔ [6,3]+ (1)
p6m (*632) [3[3[3]]] ↔ [6,3] 3