Răspuns:
DE/AB=EF/BC=DF/AC=2/3
DE/AB=2/3=>14/AB=2/3=>2AB=14·3=>AB=42:2=>AB=21cm
EF/BC=2/3=>18/BC=2/3=>2BC=18·3=>BC=54:2=>BC=27cm
DF/AC=2/3=>22/AC=2/3=>2AC=22·3=>AC=66:2=>AC=33 cm
