Kwambuka: Impinga Heptagon Icya karindwi Inzu
Soma: Impinga, Heptagon, Tumenyereye.
Vertex cyangwa Vertex yerekana aho nuburyo imbaraga zabaye mubuzima bwambere zizagaragara muri ubu buzima. Inzu ya karindwi yerekana Ubukwe n'Ubufatanye. Uyu mwanya utanga umusanzu mubi bibazo, ariko bike, kuko ari intege nke cyane. Ibindi