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Points A (-1,y) and B (5, 7) lieon a ...

Points `A (-1,y)` and B (5, 7) lieon a circle with centre O (2, - 3) . Find the values of y . Hence find the radius of the circle.

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The correct Answer is:
`:.` Radius of the circle = 5 units.
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Points A(-1, y) and B(5, 7) lie on a circle with centre O(2, -3y) . Find the values of y. Hence, find the radius of the circle.

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Knowledge Check

  • Find the equation of circle with centre ( 3, - 2) and radius 5.

    A
    ` x ^(2) + y ^(2) - 6x + 4y - 12 = 0`
    B
    ` x ^(2) + y ^(2) - 4x + 6y - 10 = 0`
    C
    ` x ^(2) + y ^(2) + 6x - y - 10 = 0`
    D
    none of these

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