Kwambuka: Impinga Semi hexagon Cumi na rimwe Inzu
Soma: Impinga, Semi-hexagon, Nshuti.
Vertex cyangwa Vertex yerekana aho nuburyo imbaraga zabaye mubuzima bwambere zizagaragara muri ubu buzima. Inzu ya cumi na rimwe yerekana inshuti n'intego. Urwanira ibyo bibazo, ariko kugeza aho bigeze. Ukunda imbaraga, ariko ntabwo ukunda imbaraga. Kuberako ushobora kuba wemera, kandi birashoboka cyane, ko bidakwiye. Ibindi