Aria unui triunghi cand cunoastem coordonatele:
[tex]A=\frac{1}{2}\cdot |\Delta|[/tex]
[tex]\Delta=\left|\begin{array}{ccc}2&-2&1\\-4&4&1\\-4&0&1\end{array}\right|[/tex]
2 -2 1
-4 4 1
Δ=(8+0+8)-(-16+0+8)=16+16-8=24
[tex]A=\frac{1}{2}\cdot 24=12[/tex]
Un alt exercitiu asemanator gasesti aici: https://brainly.ro/tema/1032277
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