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In the figure, ABCD is a trapezium with ...

In the figure, ABCD is a trapezium with AB||DC, and `angle ABC = 90^(@)`. BCFE is a quadrant of a circle. If BC = CD = 4.2 cm and AE = 18 cm, find the area of the shaded region.

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The correct Answer is:
7.56 `cm^(2)`
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