Lissafin sassan kusurwa na sassan don trapezoid daga bututun bayanan martaba
X - Faɗin trapezoid a saman.
Y - Tsayin gini.
Z - Faɗin ƙasa na trapezoid.
E - Bayanin kaurin bututu
Fasali.
Lissafin sassan kusurwa na sassa don ƙirar tsari a cikin hanyar trapezoid.