U ôron iyenge i avegher a kwagh u i yer ér trapezoid la sha paipi u i yer ér profile pipe la.
X - Ityough ki trapezoid ki ki lu sha mi la.
Y - Ijiir i eren kwagh.
Z - Ityough ki trapezoid ki ki lu shin inya la.
E - Ka i lu kwagh u profile u pipa.
Program u eren akaa.
I ôr kwagh u angôghime u sôron akaa a i gber sha u eren kwagh u i yer ér trapezoid la.