If the radius of the circle `x^2 +y^2-18x + 12y + k = 0` be 11, then `k =`

If the circle x^(2) + y^(2) + 6x - 2y + k = 0 bisects the circumference of the circle x^(2) + y^(2) +2x - 6y - 15 = 0 , then k =

If the radius of the circle x^2+y^2+4x-2y-k=0 is 4 units find k.

If the line 2x-y + k = 0 is a diameter of the circle x^2 + y^2 + 6x - 6y + 5 = 0 , then k is:

What is the radius of the circle 4x^(2) +4y^(2) -20x +12y -15=0 ?

Find the centre and radius of the circles : x^2 + y^2 - 8x - 12y - 48=0

Find the centre and radius of the circles : x^2 + y^2 - 8x - 12y - 48=0

If the circle x^(2) + y^(2) + 8x - 4y + c = 0 touches the circle x^(2) + y^(2) + 2x + 4y - 11 = 0 externally and cuts the circle x^(2) + y^(2) - 6x + 8y + k = 0 orthogonally then k =

If line 2x - y + k = 0 is a diameter of circle x^(2) + y^(2) + 6x - 6y + 5 = 0 , then k =

The length of diameter of the circle x^(2) + y^(2) + 4x - 7y - k = 0 is 9, find k.