Chigongono cha digirii 180 ndi mtundu wa chigongono chokhala ndi ngodya ya madigiri 180, omwe amagwiritsidwa ntchito makamaka pamapaipi pomwe mayendedwe amayenera kusinthidwa ndipo payipi imayenera kubwerera komwe idachokera. Chifukwa cha ngodya yake yayikulu yopindika, nthawi zambiri imagwiritsidwa ntchito nthawi zingapo.
