<PRE><B>Question 1179630</B>
.


This theorem of &amp;nbsp;Geometry is called &amp;nbsp;&quot;One-seventh area triangle&quot;.


It is &amp;nbsp;FAR &amp;nbsp;ABOVE &amp;nbsp;elementary school geometry curriculum.



About this theorem, &amp;nbsp;see these links


https://en.wikipedia.org/wiki/One-seventh_area_triangle


https://en.wikipedia.org/wiki/Routh%27s_theorem



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