If the co-ordinates of extremities of diameter of a circle are (7, -1), (5, 3), then its centre and radius are -

If the co-ordinates of extremities of diameter of a circle are (7, -1)

1.	If the co-ordinates of extremities of diameter of a circle are (7, -1), (5, 3), then its centre and radius are -
A.	(6, 1), √5
B.	(6, 1), √2
C.	(1, -2), 5
D.	(1, -2), √5
Answer» B. (6, 1), √2

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If the co-ordinates of extremities of diameter of a circle are (7, -1), (5, 3), then its centre and radius are -

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