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The radius of a circle with centre (a, ...

The radius of a circle with centre `(a, b)` and passing through the centre of the circle `x^2 + y^2 – 2gx + f^2 = 0` is -

A

`sqrt((a-g)^2+b^2)`

B

`sqrt(a^2+(b+g)^2)`

C

`sqrt(a^2+(b-g)^2)`

D

`sqrt((a+g)^2+b^2)`

Text Solution

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The correct Answer is:
A
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MAHAVEER PUBLICATION-CO-ORDINATE GEOMETRY OF TWO DIMENSIONS (CONIC SECTION)-QUESTION BANK
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  10. The point where the line x=0 touches the circle x^2+y^2-2x-6y+9=0 is

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  11. Position of the point ( 1 , 1 ) with respect to the circle x^2 + y^2-x...

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  12. The equation to a circle with centre(2,1) and touching x axis is

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  13. The circle x^2+y^2-4x-4y+4=0 is

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  14. The equation of tangents drawn from the point (0,1) to the circle x^2+...

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  16. The equation of the normal to the circle x^2+y^2=9 at the point (1/sqr...

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  17. The equation of the normal at the point (4,-1) of the circle x^2+y^2-...

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  18. Find the equation of the circle with centre(1,2) and radius 2

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