Guteranya: Impinga Isomo Ubwa mbere Inzu
Soma: Impinga, Inama, 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. Muri ibi bibazo, nubwo ukunda guhuriza hamwe, kuzuza no kwagura ibikorwa byawe nabandi, akenshi ntubyitayeho, utegereje ko batera intambwe yambere. Mugihe ibindi bihe, urumva udafite umutekano kubyo wahisemo. Ibindi