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From an external point P two tangents PA and PB are drawn to the circle with centre O. prove that OP is the perpendicular bisector of AB.
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In∆OAP and ∆OBP ,
OP=OP
PA=PB
Therefore,∆OAP=∆OBP
SO,OP is the perpendicular bisector of AB
OP=OP
PA=PB
Therefore,∆OAP=∆OBP
SO,OP is the perpendicular bisector of AB
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