Let A be the centre of the circle `x^(2)+y^(2)-2x-4y-20=0` .The tangents at the points B(1,7) and C(4,-2) on the circle meet at the point D .If `Delta ` denotes the area of the quadrilateral ABCD,then `(Delta)/(25)` is equal to

Let A be the centre of the circle x^(2)+y^(2)-2x-4y-20=0 . If the tangents at the points B (1, 7) and D(4, -2) on the circle meet at the point C, then the perimeter of the quadrilateral ABCD is

. Let A be the centre of the circle x^(2)+y^(2)-2x-4y-20=0 suppose that x^(2)+y^(2)-2x-4y-20=0 suppose that the tangents at the points B(1,7) and D(4,-2) on the circle meet at the point C. Find the area of the quadrilateral ABCD

To the circle x^(2)+y^(2)+8x-4y+4=0 tangent at the point theta=(pi)/(4) is

The tangent of the circle x^(2)+y^(2)-2x-4y-20=0 at (1,7) meets the y -axis at the point

Let B the centre of the circle x^(2) + y^(2) - 2x + 4y + 1 = 0 . Let the tangents at two points P and Q on the circle intersect at the point A(3, 1). Then 8.(("area " Delta APQ)/("area " Delta BPQ)) is equal to ________.

find the equation of the tangents to the circle x^(2)+y^(2)-2x-4y-20=0 which pass through the point (8,1)

Two tangents are drawn from the point P(-1,1) to the circle x^(2)+y^(2)-2x-6y+6=0 . If these tangen tstouch the circle at points A and B, and if D is a point on the circle such that length of the segments AB and AD are equal, then the area of the triangle ABD is equal to

Two tangents to the circle x^(2)+y^(2)=4 at the points A and B meet at P(-4,0), The area of the quadrilateral PAOB, where O is the origin,is