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⇒ O is the centre of the circle.

⇒ PQ is the chord of the circle.

⇒ AP and AQ are the tangents at points P and Q.

⇒ AP and AQ are the tangents which meet at pont - A.

TO PROVE ;-

⇒

PROOF ;-

⇒ AR = AR { common side }

So by SAS congruence rule we say that ,

And through C. P. C.T { corresponding parts of congruent triangles }

We say that ,

Hence proved .