daca AM /AB =1/2
atunci Perim.Δ MNP 1 Perim.MNP 1
-------------------- = --- ; ------------------ = ----
Perim.ΔABC 2 2+4+5 2
perimMNP = 11/2
b. P' / P = 1/2 ; P' /20 = 1/2 P'= 20:2 =10 cm
c . perim Δ MNP / perim .Δ ABC =1/2
cel mic perim Δ MNP = 1/2 ( jumatate ) ·Δ ABC