Bisector Theorem
Revision as of 11:46, 24 September 2007 by Valentin Vornicu (talk | contribs) (New page: If a triangle <math>ABC</math>, let <math>D</math> be the intersection between the side <math>BC</math> and the interior angle bisector of angle <math>\angle BAC</math>. Then <cmath> \dfra...)
If a triangle 
, let 
be the intersection between the side 
and the interior angle bisector of angle 
. Then ![\[\dfrac { AB } {AC } = \frac {BD}{CD} .\]](http://latex.artofproblemsolving.com/2/1/1/211da26ec3fac522eff069be20144769f4a2c242.png)
The converse is also true.
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