Răspuns:
Explicație pas cu pas:
A__M__B____________N____________C
MN = 10
BC = 4AB
MN = MB + BN = AB/2 + BC/2 = AB/2 + 4AB/2 = 5AB/2
AB = 2MN/5 = 20/5 = 4
MB = AB/2 = 4/2 = 2
BN = MN - MB = 10 - 2 = 8 = NC
AC = AB + BN + NC = 4 + 8 + 8 = 20
BC = 4 x 4 = 16
MC = MB + BC = 2 + 16 = 18
AN = AB + BN = 4 + 8 = 12
MC/AN = 18/12 = 3/2