Given △ DEF ∼ △ABC. If AB = 4 cm, BC = 2 cm, CA = 3 cm and EF = 4 cm, then the perimeter of △DEF is _____ cm.
Given △ DEF ∼ △ABC.
ABDE=ACDF=BCEF
4DE=3DF=24 =12
DE = 8 cm, DF = 6 cm
Perimeter (△DEF) = (8 + 6 + 4) cm = 18 cm
Perimeter (△DEF) = 18 cm