Calculate the side AD of triangle ABC — task. Maths TNSB Mentoring, Class 10.

Answer variants:

9.3

8.3

11.3

10.3

In \(\triangle ABC\), \(DE \parallel BC\) and \(\frac{AE}{EC} = \frac{6}{2}\). If \(DB = 3.1 \ cm\), then \(AD =\)

\(cm\).

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1. Calculate the side AD of triangle ABC