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In given figure, arcs have been drawn of radius \(21 \ cm\) each with vertices \(A\), \(B\), \(C\) and \(D\) of quadrilateral \(ABCD\) as centres. Find the area of the shaded region.
 
YCIND_240408_6170_circle_A27.png
 
Area of shaded region \(=\) \(cm^2\)