1. Chord AB of a circle when extended meets the tangent to the circle at point P. PT is the tangent touching the circle at point T. If lengths of PT and PB are 6 cm and 4 cm respectively, what is the length of PA?





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  • By: anil on 05 May 2019 02.17 am
    Given : PT = 6 cm and PB = 4 cm To find : PA = ? Solution : Using properties of tangents, $$(PT)^2 = PA imes PB$$ => $$(6)^2 = (PA) imes 4$$ => $$PA = frac{36}{4} = 9$$ cm => Ans - (D)
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