PA and PB are tangents drawn from an exterior point P to a circle with centre O in the given figure. If length of PA is 12 cm, the length of chord AB is

Dear Student,
Here radius of the circle is not given so we cannot find the length of chord AB.  So please recheck the question.

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fig pls..
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construct O to P and find OP by using pythogorus theorem then you will get OP then again using Pythogorus theorem find PB
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then add AO and OB you get AB
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What are you looking for?