[" From an external point P,two tangents PA and PB are dratun to the circle with centre "],[" a berencticular bisector of AB."]

From an external point two tangents PA and PB are drawn to the circle with center O. Prove that OP is perpendicular bisector of AB.

From an external point P, two tangents PAandPB are drawn to the circle with centre O .Prove that OP is the perpendicular bisector of AB.

From an external point P , two tangents PA and PB are drawn to the circle with centre O . Prove that O P is the perpendicular bisector of A B .

From an external point P, two tangents, PA and PB are drawn to a circle with centre 0. At one point E on the circle tangent is drawn which intersects PA and PB at C and D, respectively. If PA=10 cm, find the perimeter of the triangle PCD.

From an external point P, two tangents, PA and PB are drawn to a circle with centre 0. At one point E on the circle tangent is drawn which intersects PA and PB at C and D, respectively. If PA=10 cm, find the perimeter of the triangle PCD.

In the given Fig. 5, from an external point P, a tangent PT and a secant PAB is drawn to a circle with centre 0. ON is perpendicular on the chord AB. Prove that PA.PB = PT^(2) ?.

From an external point P, tangents PA and PB are drawn to a circle with centre O. If |__PAB=50^(@) , find |__AOB .

As shown in the given figure, from an external point P, a tangent PT and a line segment PAB are drawn to a circle with centre O. ON is perpendicular on the chord AB, Prove that PA.PB = PN^(2) - AN^(2)

Two concentric circles with centre O are of radius 3 cm and 5 cm. From an external point P, two tangents PB and PA are drawn to these circles respectively. If PA=12 cm, find PB.

From an external point P, tangent PA=PB are drawn to a circle with centre O. If anglePAB=50^@, then find angleAOB .