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If O is the centre of a circle, PQ is a chord and the tangent PR at P makes an angle of 50 degree with PQ, then find angle POQ.

  • maths -

    Since the tangent is perpendicular to the radius,

    OPQ = 90-40=50
    also, OQP=50
    so, POQ=180-50-50=100

  • maths -

    180-50-50=80

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