"Francesco" <nas### [at] gmailcom> wrote:
>
> Calculating area triangle per triangle I can always suppose z=0 (translating
> and rotating axis) as triangles are 2D. So I think the formula posted by >
> Penelope20k is good.
>

If I rotate axis the coordinates are different, so I am really confused : ))

May be I could also use Eron's formula, Area= sqrt (s(s-a)(s-b)(s-c)).

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