For the circle \( x^{2}+y^{2}=r^{2} \), find the value of \( r \) f...

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For the circle \( x^{2}+y^{2}=r^{2} \), find the value of \( r \) for which the area enclosed by the tangents drawn from the point
\( \mathrm{P} \) \( P(6,8) \) to the circle and the chord of contact is

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