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Re: [obm-l] Euler

To: obm-l@xxxxxxxxxxxxxx
Subject: Re: [obm-l] Euler
From: F�bio Dias Moreira <fabio.dias.moreira@xxxxxxxxxxxx>
Date: Sun, 4 May 2003 14:35:45 -0300
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On Sunday 04 May 2003 01:56, pichurin wrote:
> o que � a rela��o de Euler neste problema?
> BA*DC + AC*DB + CB*DA=0
> P.S.:Qua'� a resolu��o deste problema?
> [...]

Voc� quer dizer teorema de Ptolomeu-Euler? Ele diz que para um quadril�tero 
convexo ABCD qualquer,

AC*BD <= AB*CD + BC*DA

valendo a igualdade se e somente se ABCD � inscrit�vel.

[]s,

- -- 
F�bio "ctg \pi" Dias Moreira
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