Kubalwa kwendzawo yendzawo lenesimo lesingakavami
Ucelwa kutsi ukhombise tilinganiso ngemamitha
A B,
B C,
C D,
D A - tilinganiso tetinhlangotsi tesakhiwo
U - indzawo leseceleni
Njengemphumela wekubalwa, loluhlelo lutawuncuma indzawo yesayithi, ema-angle langatiwa kanye nebukhulu be-diagonal.