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Multiple choice

$AB$ and $CD$ are two chords of a circle which intersect at right angle at $E$. If $AE=2\ cm,EB=6\ cm,ED=3\ cm$, then radius $(r)$ is equal to:

  1. $\dfrac {\sqrt {65}}{2}$
  2. $\sqrt {65}$
  3. $2\sqrt {65}$
  4. $None\ of\ these$
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B Correct answer

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