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Barrow's Inequality

Let P be an internal point of the triangle ABC. Let the angle bisectors of the three angles from P to the vertices of ABC meet its sides at A', B', and C'.
Then .

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"Barrow's Inequality" from the Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/BarrowsInequality/
Contributed by: Jay Warendorff
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