Bosala calcul ya etando ya triangle na ba sommets (3,4), (5,6), (7,8) .
 Pona koluka etando ya triangle na ba sommets oyo epesami, tokoki kosalela formule déterminante. Tika (x1,y1), (x2,y2), mpe (x3,y3) ezala ba coordonnées ya ba sommets misato ya triangle. Etando ya triangle epesami na formule : Etando = abs( (x1*(y2-y3) + x2*(y3-y1) + x3*(y1-y2) ) / 2 ) Kozongisa ba valeurs ya ba coordonnées oyo epesami (3,4), (5,6), (7,8) na kati ya formule, tozui x1 = 3, y1 = 4, x2 = 5, y2 = 6, x3 = 7, y3 = 8 Etando = abs( (3*(6-8) + 5*(8-4) + 7*(4-6) ) / 2 ) Etando = abs( (-6 +20 -14) / 2 ) = abs( 0 ) = 0 Donc, etando ya triangle oyo ezali na ba sommets (3,4), (5,6), (7,8) ezali 0 unités carrées. Yango elingi koloba ete ba points misato ezali collineaires mpe esalaka triangle te.