# Question 1 of 31

The figure below shows 3 overlapping identical triangle. If the area of each big triangle is 80cm$^2$ and the area of the figure is 210cm$^2$, Find the area of the shaded triangle.

A
5cm$^2$
B
10cm$^2$
C
15cm$^2$
D
20cm$^2$
E
None of the above