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mygif
norcekri Said,
February 2nd, 2011 @11:53 am  

You need to parameterize the coordinates of the corners, such as
(x, y+b) (x+a, y+b)
(x, y) (x+a, y)

Then you can use the distance formula, and the two distance expressions will converge to the same value.

Does that solve it for you?

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