ΔMNP ~ ΔABC
AB=10cm; BC=12cm; MP=50cm; k=5/2
MN/AB=NP/BC=MP/AC=5/2
MN/AB=5/2 => MN=5AB/2
MN=5•10cm/2=25cm
NP/BC=5/2 => NP=5BC/2
NP=5•12cm/2=30cm
MP/AC=5/2=> AC=2MP/5
MP=2•50cm/5=20cm
R: MN=25cm; NP=30cm; AC=20cm
Verificare: MN/AB=NP/BC=MP/AC=25/10=30/12=50/20=5/2 (A)
P ΔABC=AB+BC+AC=(10+12+20)cm=42cm