[A83] Re: The shape of a cord


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[A83] Re: The shape of a cord




Sorry for the multiplication sign, it was a typo. :)

Here's the corrected one:

      y1(x2-x2)+y2(x1-x3)+y3(x2-x1)
a=(-1)-----------------------------
          (x3-x2)(x1-x3)(x2-x1)

PG




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