Iban dumu tan ilkamnen s 4 ichrutan meɣ ilan a ojjaran 4 ichrutan: Hexagon, rectangle, octagon, decagon, rhombus, parallelogram, pentagon, dodecahedron, heptagon
4 ašrutăn: rectangle, rhombus, parallelogram A ilan a ojjaran 4 ihandagan: hexagon, octagon, decagon, pentagon, dodecahedron, heptagon