Răspuns:
a. 2/5 ; b. 3/2
Explicație pas cu pas:
△ABC ~△AMN
a.
[tex] \frac{an}{ac} = \frac{am}{ab} = \frac{2}{5} [/tex]
b.
[tex] \frac{am}{ab - am} = \frac{2}{5 - 2} \\ = > \frac{am}{bm} = \frac{2}{3} \\ \frac{cn}{an} = \frac{bm}{am} = \frac{3}{2} [/tex]