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Prove thata the tangent drawn at …

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Prove thata the tangent drawn at the end of the chord of a circle make equal angles with the chord
  • 2 answers

Raja Gupta 4 years, 9 months ago

Yes , right answer

Yogita Ingle 4 years, 9 months ago

Given:- A circle with center O,PA and PB are tangents drawn at ends A and B on chord AB.

To prove:- ∠PAB=∠PBA

Construction:- Join OA and OB

Proof:- In △AOB, we have

OA=OB(Radii of the same circle)

∠OAB=∠OBA.....(1)(Angles opposite to equal sides)

∠OAP=∠OBP=90(∵Radius⊥Tangent)

⇒∠OAB+∠PAB=∠OBA+∠PBA

⇒∠OAB+∠PAB=∠OAB+∠PBA(From (1))

⇒∠PAB=∠PBA

Hence proved.

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