Răspuns:
b. MB/AM=NC/NA
3/AM=9/3
AM=1
d.
AB=AM+MB
NC/AC=MB/AB
NC=3
AM = 1 cm
NC = 3 cm
Explicație pas cu pas:
b)
MN || BC => AM/MB = AN/NC
AM = AN·MB/NC = 3·3/9 = 9/9 = 1 cm
d)
MN || BC => MB/AB = NC/AC
NC = MB·AC/AB = 2·15/10 = 30/10 = 3 cm
