find the area of the shaded region-
of side 12 cm 18 cm
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it is a rectangle
so ab is equals to 18 cm
in semi circle
d=18
r=9
area of semi circle=πr
=22/7×9
=28.26cm square
area of rectangle=lxb
=12×18
=216cm square
area of shaded region=area of rectangle-area of semicircle
=216-28.26
=187 .74cm square
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