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Se considera punctele A(-4,3), B(0,6) si c( 6,-2). Calculati aria triunghiului.


Răspuns :

[tex] A_{ABC}=| \frac{1}{2} \left[\begin{array}{ccc}-4&3&1\\0&6&1\\6&-2&1\end{array}\right]| [/tex]=| 1/2(-6-44)|=1/2*(50)=25