Inkokora ya dogere 90 ni ubwoko bwinkokora ifite inguni ya dogere 90, ahanini ikoreshwa muguhindura icyerekezo cyumuyoboro. Ubusanzwe ikoreshwa muri sisitemu y'imiyoboro aho hasabwa inguni zikomeye, nko mugihe ibindi bikoresho byumuyoboro bigomba guhuzwa mbere cyangwa nyuma yo kugonda.
