Ex 2, dau coroana plus 50 de puncte. Repedeeeeee urgentttttr am nevoie!!!!

Răspuns:
ΔABC asemenea ΔDEF
AB/DE=AC/DF=BC/EF=k
AB=6cm
DE=9cm
k=(6/9)⁽³=>k=2/3
Salut!
ΔABC ~ ΔDEF
AB = 6 cm
DE = 9 cm
k = ?
ΔABC ~ ΔDEF ⇒ AB/DE = BC/EF = AC/DF = k
AB/DE = k
6/9 = k
k = 6/9 = 2/3.