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drawing polygon and calculate area!!!

dedo mraz
Greenhorn

Joined: Aug 12, 2013
Posts: 1
i have this code which allows you to draw polygon but i don't know how to implement the formula to calculate the area of the polygon (the formula is in the end of the code).


Richard Tookey
Ranch Hand

Joined: Aug 27, 2012
Posts: 1035
    
  10

I think the 'C' function to calculate area is flawed. You should go back to the site you obtained it from and make sure you have copied it correctly. Pay particular attention to the signs of the terms.
 
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subject: drawing polygon and calculate area!!!
 
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