The diagonals of a rhombus \( A B C D \) intersect at \( O \), \( A O=3 \mathrm{~cm}, B O=4 \mat...

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The diagonals of a rhombus \( A B C D \) intersect at \( O \), \( A O=3 \mathrm{~cm}, B O=4 \mathrm{~cm} \) then, length of \( B C \) is
(a) \( 6 \mathrm{~cm} \)
(b) \( 8 \mathrm{~cm} \)
(c) \( 5 \mathrm{~cm} \)
(d) None of these
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