Răspuns:
Explicație pas cu pas:
1. Cazul de asemanare UU (unghi, unghi)
2. m(M)=m(A)=180-125=55
3. BC/NP=AB/MN=AC/MP; 18/12=AB/10=AC/14; 3/2=AB/10; AB=3*10/2=15; 3/2=AC/14; AC=14*3/2=21
4. Perim tr ABC=18+15+21=54
5. Aria ABC/aria MNP=(3/2)^2=9/4; Aria ABC/24rad6=9/4; Aria ABC=9*24rad6/4=9*6rad6=56rad6
