Talk:Shoelace Theorem
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Proof
Perhaps we can use induction? But I do not know how to prove it nicely for a triangle. --1=2 12:50, 16 June 2008 (UTC)
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Perhaps we can use induction? But I do not know how to prove it nicely for a triangle. --1=2 12:50, 16 June 2008 (UTC)
