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Questions  >>  Olympiad-Math  >>  Class 9
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Q)

A point D is on the side BC of an equilateral triangle ABC such that $DC=\large\frac{1}{4}$$BC$.Then $AD^2$=____$CD^2$

$\begin{array}{1 1}16\\13\\12\\10\end{array} $

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Answer : 13
$AD^2=13 CD^2$
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