If ABCD be a rhombus, AC is its smallest diagonal and $\angle ABC$ = $60^{0}$ ,find length of a side of the rhombus when AC = 6 cm.

If ABCD be a rhombus, AC is its smallest diagonal and $\angle ABC$ = $60^{0}$ ,find length of a side of the rhombus when AC = 6 cm.
1). 6 cm
2). 3 cm
3). $6\sqrt{2}$ cm
4). $3\sqrt{3}$ cm

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