1. Area of shaded reagion of semi circle

In the below \(ABCD\) is a square of side 16 \(cm\). With centres \(A\), \(B\), \(C\) and \(D\), four circles are drawn such that each circle touch externally two of the remaining three circles. Find the area of the shaded region.

 

 

The area of the shaded region  \(cm^2\).