The line `y=mx+c` will be a normal to the circle with radius `r` and centre at `(a,b)` if

If the line 3 x-2 y+6=0 meets x -axis and y -axis respectively at A and B , then the equation of the circle with radius A B and centre at A is

The focal chords of the parabola y^(2)=16x which are tangent to the circle of radius r and centre (6, 0) are perpendicular, then the radius r of the circle is

The focal chords of the parabola y^(2)=16x which are tangent to the circle of radius r and centre (6, 0) are perpendicular, then the radius r of the circle is

If the line y=mx+c is a normal to the parabola y^2=4ax , then c is

If the line y=mx+c is a normal to the parabola y^2=4ax , then c is

If the line x+3y=0 is tangent at (0,0) to the circle of radius 1, then the centre of one such circle is

If the line x+3y=0 is the tangent at (0,0) to the circle of radius 1, then the centre of one sum circle is

If the line x+3y=0 is tangent at (0,0) to the circle of radius 1, then the centre of one such circle is

The line y=x is a tangtnt at (0,0) to a circle of radius unity. The centre of the circle is