1. The length of a tangent from an external point to a circle is 5√3 unit. If radius of the circle is 5 units, then the distance of the point from the circle is





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  • By: anil on 05 May 2019 01.53 am

    $$ecause$$ AB is a tangent to circle at B,
    $$ herefore angle{OBA}=90$$
    In $$ riangle{AOB}$$,
    $$AO^{2}=OB^{2}+AB^{2}$$
    $$AO^{2}=5^{2}+(5sqrt{3})^{2}$$
    $$AO=10 cm$$
    Hence, Option A is correct.
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