If OA and OB are the tangent from the origin to the circle `x^(2)+y^(2)+2gx+2fy+c=0 and C` is the centre of the circle then the area of the quadrilateral OCAB is

If OA and OB are the tangents from the origin to the circle x^(2)+y^(2)+2gx+2fy+c=0 and C is the centre of the circle,the area of the quadrilateral OACB is

If OA and OB are the tangents from te origin to the circle x^2+y^2 +2gx+2fy+c=0 and C is the centre of the circle, the area of the quadrilateral OACB is

If the tangents AB and AQ are drawn from the point A(3, -1) to the circle x^(2)+y^(2)-3x+2y-7=0 and C is the centre of circle, then the area of quadrilateral APCQ is :

If the tangents AB and AQ are drawn from the point A(3, -1) to the circle x^(2)+y^(2)-3x+2y-7=0 and C is the centre of circle, then the area of quadrilateral APCQ is :

OA and OB are tangents drawn from the origin O to the circle x^2+y^2+2gx + 2fy +c=0 where c > 0, C being the centre of the circle. Then ar (quad. OACB) is:

The equation of the tangents drawn from the origin to the circle x^(2)+y^(2)-2gx-2fy+f^(2)=0 is

From the point P(16,7), tangents PQ and PR are drawn to the circle x^(2)+y^(2)-2x-4y-20=0 If C is the centre of the circle,then area of quadrilateral PQCR is

If the origin lies inside the circle x^(2) + y^(2) + 2gx + 2fy + c = 0 , then

Tangents drawn from the origin to the circle x^(2)+y^(2)+2gx+2fy+f^(2)=0 are perpendicular if

Tangents OP and OQ are drawn from the origin o to the circle x^(2)+y^(2)+2gx+2fy+c=0. Find the equation of the circumcircle of the triangle OPQ.