Guteranya: Izuba Heptagon Impinga
Soma: Ingufu, Heptagon, Impinga.
Izuba ryerekana ubushake bwimiterere nubushobozi bwumuntu. Vertex cyangwa Vertex yerekana aho nuburyo imbaraga zabaye mubuzima bwambere zizagaragara muri ubu buzima. Uyu mwanya utanga umusanzu mubi bibazo, ariko bike, kuko ari intege nke cyane. Ibindi