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Geometry Problem 1178: Triangle, Internal Angle Bisector, Metric Relations

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In a triangle ABC, AD is the internal angle bisector of angle A. Prove using pure geometry only that .
This entry contributed by Sumith Peiris.


  

Geometry Problem 1178: Triangle, Internal Angle Bisector, Metric Relations

 

 

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Last updated: Jan 14, 2016

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