Question

If diagonal of a square is 13 cm then find its side.
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Answer 1

Let side of square be a.

$2 {a}^{2} = {13}^{2} \\ 2 {a}^{2} = 169 \\ {a} = \frac{ \sqrt{169} }{ \sqrt{2} } \\ a = \frac{13}{ \sqrt{2} }$

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