A straight line x = y + 2 touches the circle 4(x2 + y2) = r2. The valu – McqOptions

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1.	A straight line x = y + 2 touches the circle 4(x2 + y2) = r2. The value of r is
A.	\(\sqrt 2\)
B.	\(2\sqrt 2\)
C.	2
D.	1
Answer» C. 2

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