Iminyango yengilazi engangeni umlilo iyiminyango yengilazi ephephile. Ingilazi ekwazi ukumelana nomlilo yenziwe ngengilazi entantayo yekhwalithi ephezulu, etholakala ngokusabela ngokomzimba namakhemikhali. Ingilazi emelana nomlilo ine-engeli eyi-obtuse ngemva kokuphuka, futhi izingcezu zincane kunezingilazi ezipholile, ezinciphisa umonakalo kubantu.