👤

Calculati aria triunghiului ABC,unde A(2,8) ,B(3,0),C(6,-2)

Răspuns :

[tex]A= \frac{1}{2} *|\triangle|= \frac{22}{2} =11\\ \triangle= \left|\begin{array}{ccc}2&8&1\\3&0&1\\6&-2&1\end{array}\right| =22[/tex]