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NotTheSmartest  Mar 7, 2017
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By Euclid, a bisector of the apex angle of the triangle sets up the following proportion...

 

MO /NO   = LM/ LN

 

x / 4  =  18 / 10        cross-multiply

 

10x  =  18 * 4

 

10x  = 72    divide both sides by 10

 

x = 7.2

 

 

cool cool cool

CPhill  Mar 7, 2017

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