+0  
 
0
109
2
avatar+464 

Here we go

 

 Oct 10, 2018
 #1
avatar+96373 
+1

 Δ EDC   ~  Δ  EBA

 

So

 

EC  / DC  = EA / BA

 

EC / 8  = 5 / 4       multiply both sides by 8

 

EC  =  8 *  ( 5 /4)  

 

EC =  40 / 4  

 

EC  = 10

 

 

cool cool cool

 Oct 10, 2018
 #2
avatar+464 
+1

You are right, thank you CPhill 

 Oct 11, 2018
edited by shreyas1  Oct 11, 2018

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