Igwe nchighari a bu ihe kariri ihe okike mechiri emechi nke ndi arcs mere ka ha mee ka ha mata ihe osise nke ichoro ichota uche n'egbughị oge na enweghi nchegbu banyere odidi ya.
N'etiti ya nhọrọ i nwere ike ịgbanwe na ogologo nke arcs nke igwe-oji, nke ga-amụba ma ọ bụ ibelata ihe ndị arcs mkpa ike ya, anyị nwekwara ike tọghata ihe ndị dị otú ahụ dị ka a polyline ma ọ bụ ihe ellipse na a idegharị ígwé ojii na ọbụna ịgbanwe gị style , nke ga-eme ka okpukpu nke okpukpu ọ bụla nke arc gbanwee.