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Question 1
13284

The centre and radius of the circle \({x^2} + {y^2} = 4\) is? 

A.

\(C\,(\sqrt 2 ,\sqrt 2 ),\;r = 2\)

B.

\(C\,(0,0),\;r = 2\)

C.

\(C\,(0,0),\;r = 4\)

D.

\(C\,(\sqrt 2 ,\sqrt 2 ),\;r = 4\)

\(C\,(0,0),\;r = 2\)

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