[" If from an external point "P" of a circle with centre "O" ,two tangents "PQ" and "PR" are drawn such that "],[32" .If "Delta ABC" is and "2PQ=PO" ."]

If from an external point P of a circle with centre O,two tangents PQ and PR are drrawn such /_QPR=120^(@), prove that 2PQ=PO .

If the points of contact of the tangents drawn from an external points P to a circle with centre O be A and B,then show that PAOB is a cyclic quadrilateral.

AP and AQ are two tangents drawn from an external point A to a circle with centre O, P and Q are points of contact. If PR is a diameter, prove that OA||RQ.

In the figure , PQ and PR are tangents drawn from and external point P to the circle with centre O. Q and R are the points of contact. If PQ = 5 cm then what is the length of segment PR ? Why ?

In figure PQ and PR are tangents drawn from P to a circle with centre O.If angleOPQ=35^@ then

In Fig,PQ is a tangent from an external point P to a circle with centre O and OP cuts the circle at T and QOR is a diameter.If /_POR=130^(@) and S is a point on the circle, find /_1+/_2

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

In From an external point P, Two tangents PQ and PR are drawn to a circle of radius 4 cm with centre O . If angle QPR = 90^(@) then length of PQ is