MNP triunghi oarecare
unde E ∈ (MN) si F ∈ (MP)
cu EM = 18 cm si EN = 12 cm
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EM/(EN+EM) =) 18/(12+18) = 15/(15+NP)=21/NP
=) 18*(15+FP)=30*15
=) 270+18*FP = 450
=) 18*FP=450-270
=) 18*FP = 180
=) FP=10 cm
NP = ? = ) 18/(12+18)=21/NP
18/20=21/NP
3/5=21/NP
3*NP=105
NP=35