If one of the diameters of the circle `x^(2)+y^(2)-2x-6y+6=0` is a chord to the circle with centre at (2,1) show that the radius of the circle is 3.

If one of the diameter of the circle x^(2)+y^(2)-2x-6y+6=0 is a chord to the circle with centre (2, 1), then the radius of the bigger circle is

If the circle x^(2)+y^(2)-4x+6y+a = 0 has radius 4 then find a.

If the circle x^(2) + y ^(2) + ax + by - 12=0 has the centre at (2,3) then find a, b and the radius of the circle .

If one of the diameter of the circle , given by the equation , x^(2) + y^(2) - 4x + 6y - 12 = 0 , is a chord of a circle S , where centre is at (-3,2) , then the radius of S is

Find the value of a if 2x^(2)+ay^(2)-2x+2y-1=0 represents a circle and also find its radius. (ii) Find the values of a,b if ax^(2)+bxy+3y^(2)-5x+2y-3=0 represents a circle. Also find the radius and centre of the circle. (iii) If x^(2)+y^(2)+2gx+2fy=0 represents a circle with centre (-4,-3) then find g,f and the radius of the circle. (iv) If the circle x^(2)+y^(2)+ax+by-12=0 has the centre at (2,3) then find a ,b and the raidus of the circle. (v) If the circle x^(2)+y^(2)-5x+6y-a=0 has radius 4 , find a

Find the centre and radius of the circle 3x^(2)+ 3y^(2) - 6x + 4y - 4 = 0

The equation of the diameter of the circle x^(2) + y^(2) -4x-6y +3 = 0 that is perpendicular 2x + 5y-6 = 0 is

If the circle x^(2)+y^(2)+ax+by-12=0 has the centre at (2,3) then find a, b, and the radius of the circle.

If the circle x^(2) + y^(2) -4x + 6y + a =0 has radius 4, find a.