Ukubalwa kwama-diagonali wokutshwaya isisekelo
Sibawa utjengise ubukhulu obutlhogekako ngamamilimitha
X - ubude besisekelo
Y - Ububanzi besisekelo
Amakghono wehlelo.
Ukubalwa kwe-diagonali yokutshwaya isisekelo nofana amaboda.
Isetjenziselwa ukubeka i-engeli eqondileko yamadigri ama-90.