ΔABC is an equilateral triangle. D, E are the mid points of AB and AC respectively. If DE = 3 cm, then the perimeter of ΔABC is
A. 9 cm
B. 12 cm
C. 15 cm
D. 18cm
Answer:D
ΔABC is an equilateral triangle. D, E are the mid points of AB and AC respectively. If DE = 3 cm, then the perimeter of ΔABC is
A. 9 cm B. 12 cm C. 15 cm D. 18cm