Question

va rog ajutor pls help​

Answer 1

Explicație pas cu pas:

$\dfrac{MB}{AM} = \dfrac{2}{5}$

NC = 8 cm ⇒ AN = AC-NC = 28-8 = 20 cm

$\dfrac{NC}{AN} = \dfrac{8}{20} = \dfrac{2}{5}$

⇒

$\dfrac{MB}{AM} = \dfrac{NC}{AN} = \dfrac{2}{5}$

$\implies \bf MN \ || \ BC$