<PRE><B>Question 256042</B>
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I don&#39;t think you meant &#39;congruent.&#39;  I think you meant &#39;concurrent.&#39;  See the Wikipedia article on Ceva&#39;s Theorem:


http://en.wikipedia.org/wiki/Ceva&#39;s_theorem


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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