Question 1114764
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For your info:


<pre>
    There is a Theorem in Elementary Geometry:

      In any triangle, an angle bisector divides the opposite side in the ratio, equal to the ratio of two other sides of the triangle.
</pre>


See the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/geometry/On-what-segments-the-angle-bisector-divides-the-side-of-a-triangle.lesson>On what segments the angle bisector divides the side of a triangle</A>

in this site.


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Also, &nbsp;you have this free of charge online textbook on Geometry

&nbsp;&nbsp;&nbsp;&nbsp;<A HREF=https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson>GEOMETRY - YOUR ONLINE TEXTBOOK</A> 

in this site.


The referred lesson is the part of this online textbook under the topic &nbsp;"<U>Properties of triangles</U>".



Save the link to this online textbook together with its description


Free of charge online textbook in GEOMETRY
https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson


to your archive and use it when it is needed.



It is the best available source (textbook) in Geometry which I know . . .