Răspuns: -problema i
DM/AM=3/2
DM/(DM+AM)=DM/AD=3/(2+3)=3/5
MN intersectat cu DB={P}
DM/AD=MP/AB 3/5=MP/24 MP=24*3/5=72/5=14,4
ptr ca trapezul este isoscel putem scrie
CN/NB=3/2 (CN+NB)/NB=CB/NB=(3+2)/2=5/2 si NB/CB=2/5
NB/CB=NP/CD
2/5=NP/9
NP=2*9/5=18/5=3,6
MN=14/4+3,6=18 cm
Explicație pas cu pas:
