The director circle of the parabola `(y-2)^(2)=16(x+7)` touches the circle `(x-1)^(2)+(y+1)^(2)=r^(2)` then `r` is equal to

The circle (x-r) ^(2) + (y-r) ^(2) =r ^(2) touches

The parabola y^(2)=4x and the circle (x-6)^(2)+y^(2)=r^(2) will have no common tangent if r is equal to

If the circle x^(2) + y^(2) = 9 touches the circle x^(2) + y^(2) + 6y + c = 0 internally, then c is equal to

If m is the slope of a common tangent of the parabola y^(2)=16x and the circle x^(2)+y^(2)=8 , then m^(2) is equal to

The equation of director circle to the circle x^(2) + y^(2) = 8 is

chord of contact of the tangents drawn from a point on the circle x^(2)+y^(2)=81 to the circle x^(2)+y^(2)=b^(2) touches the circle x^(2)+y^(2)=16 , then the value of b is

The parabola y^(2)=4x and the circle x^(2)+y^(2)-6x+1=0

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