Question

Mă puteți ajuta????????​

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

$\it AB||YZ\ \stackrel{T.f.a.}{\Longrightarrow}\ \Delta XYZ\sim\Delta XAB \Rightarrow \dfrac{YZ}{AB}=\dfrac{XY}{XA} \Rightarrow\dfrac{YZ}{6}=\dfrac{\dfrac{70}{6}}{7} \Rightarrow\\ \\ \\ \Rightarrow\ YZ=\dfrac{6\cdot\dfrac{70}{6}}{7}=\dfrac{70}{7}=10\ cm$