Circumradius of \( \triangle A B C \) is \( 3 \mathrm{~cm} \) and i...

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Circumradius of \( \triangle A B C \) is \( 3 \mathrm{~cm} \) and its area is \( 6 \mathrm{~cm}^{2} \). If \( D E F \) is the triangle formed by feet of the perpendiculars drawn
\( \mathrm{P} \) from \( A, B \) and \( C \) on the sides \( B C, C A \) and \( A B \), respectively,

W then the perimeter of \( \triangle D E F \) (in \( \mathrm{cm} \) ) is
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