Răspuns:
Deltate AMB= deltate BNC cazul L.U.L.
adica{Â = C (ABCD – palalelogram
{AM = CN conf.ip.)
{AD = CB –para.
MD=BN
si{delta N=MB (DC – NC = AB – AM)
{delta N// MB (ABCD – palalelogram)
MBND – palalelogram (are 2 laturi opuse congurente si paralele
