Imiyalo yokusetshenziswa: faka ubude besisekelo (b) kanye nezinhlangothi (a) efomini lokubala, bese ucindezela inkinobho “Bala”. Ngenxa yalokho, indawo yesibalo enobukhulu obucacisiwe izobalwa.
Ifomula yokubala
Indawo S Unxantathu we-isosceles ubalwa ngefomula:
