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A straight line x=y+2 touches the circle...

A straight line `x=y+2` touches the circle `4(x^2+y^2)=r^2` , The value of r is:

A

`sqrt2`

B

`2sqrt2`

C

2

D

1

Text Solution

Verified by Experts

The correct Answer is:
B
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PUNEET DOGRA-CIRCLE -PREV YEAR QUESTIONS
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  8. Consider the two circles (x-1)^(2) + (y-3)^(2) = r^(2) and x^(2) + y^(...

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  11. Consider a circle of passing through the origin and the points (a,b) ...

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  12. A straight line x=y+2 touches the circle 4(x^2+y^2)=r^2 , The value of...

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  13. If the centre of the circle passing through the origin is (3,4). th...

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  14. Consider the circles x^(2) + y^(2) + 2ax + c = 0 and x^(2) + y^(2) + 2...

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  15. Consider the circles x^(2) + y^(2) + 2ax + c = 0 and x^(2) + y^(2) + 2...

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  18. What is the radius of the circle touching x-axis at (3,0) and y-axis ...

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  19. What is the equation to circle which touchs both the axes and has cen...

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