Kwambuka: Impinga Semicircle Ubwa mbere Inzu
Soma: Impinga, Semicircle, Wowe.
Vertex cyangwa Vertex yerekana aho nuburyo imbaraga zabaye mubuzima bwambere zizagaragara muri ubu buzima. Inzu ya mbere yerekana imiterere n'imyitwarire yo hanze no kugaragara. Igiciro na morale yibi bibazo birashobora kugira ingaruka zitaziguye. Ariko ntabwo bigera aho bidashobora gukosorwa. Ibindi