Răspuns :
[tex]\it d||AB\ \stackrel{T.Thales}{\Longrightarrow}\ \dfrac{x}{2,66}=\dfrac{^{5)}3,2}{2,8}\ \Rightarrow \dfrac{x}{2,66}=\dfrac{\ 16^{(2}}{14} \Rightarrow \dfrac{x}{2,66}=\dfrac{8}{7}|_{\cdot7} \Rightarrow\\ \\ \\ \Rightarrow \dfrac{x}{0,38}=8 \Rightarrow x=0,38\cdot8=3,04\ cm[/tex]