The big triangle is equilateral with area 18 sq.cm. The 3 lines are parallel to the sides trisecting the sides. The shaded area is ____.
1
6 sq.cm
2
9 sq.cm
3
11 sq.cm
4
12 sq.cm
The big triangle is equilateral with area 18 sq.cm. The 3 lines are parallel to the sides trisecting the sides. The shaded area is ____.