6. Find the side length of the triangle

Answer variants:
4.143
5.143
3.143
2.143
In \(\triangle ABC\), \(D\) and \(E\) are points of the sides \(AB\) and \(AC\), respectively. If \(DE \parallel BC\), \(AD = 2 \ cm\), \(DB = 5 \ cm\) and \(AC = 5.8 \ cm\), then find \(EC\).
 
12.svg
 
The value of \(EC\) is
 \(cm\).
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