Answer :
To find perimeter of shaded region(P)
Radius of semicircle is r = 7cm
Length (L) of side of square = 14cm
P = length of DPC + length of APB + length of AD + length of BC
[Since, DPC and APB are semicircles and Perimeter of semicircle = πr]
P = πr + πr + 14 + 14
= 2πr + 28
= 44 + 28
= 72 cm
Perimeter of the shaded region is 72cm
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