In Fig, ABC is a right - angle triangle, \[\angle B=90{}^\circ ,AB=28\text{ }cm\] and \[BC=21\text{ }cm\]. With AC as diameter, a semicircle is drawn and with BC as radius, a quarter-circle is drawn. Find the area of the shaded region correct to two decimal places.

In Fig, ABC is a right - angle triangle, \[\angle B=90{}^\circ ,AB=28\

1.	In Fig, ABC is a right - angle triangle, \[\angle B=90{}^\circ ,AB=28\text{ }cm\] and \[BC=21\text{ }cm\]. With AC as diameter, a semicircle is drawn and with BC as radius, a quarter-circle is drawn. Find the area of the shaded region correct to two decimal places.
A.	\[428.75\,c{{m}^{2}}\]
B.	\[857.50\,c{{m}^{2}}\]
C.	\[214.37\,c{{m}^{2}}\]
D.	\[371.56\,c{{m}^{2}}\]
Answer» B. \[857.50\,c{{m}^{2}}\]

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In Fig, ABC is a right - angle triangle, \[\angle B=90{}^\circ ,AB=28\text{ }cm\] and \[BC=21\text{ }cm\]. With AC as diameter, a semicircle is drawn and with BC as radius, a quarter-circle is drawn. Find the area of the shaded region correct to two decimal places.

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