A circle is circumscribed around a square as shown in the figure. The area of one of the four shaded portions is equal to $$\frac{4}{7}$$. The radius of the circle is :

A circle is circumscribed around a square as shown in the figure. The

1.	A circle is circumscribed around a square as shown in the figure. The area of one of the four shaded portions is equal to $$\frac{4}{7}$$. The radius of the circle is :
A.	$\sqrt 2 $$
B.	$\frac{1}{{\sqrt 2 }}$$
C.	$2$$
D.	$3$$
Answer» B. $\frac{1}{{\sqrt 2 }}$$

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A circle is circumscribed around a square as shown in the figure. The area of one of the four shaded portions is equal to $$\frac{4}{7}$$. The radius of the circle is :

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