Ononot — In \triangle ABC, the side lengths are AB=7, BC=8, and AC=9.

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Euclidean 2Dmedium

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In $\triangle ABC$ , the side lengths are $AB=7, BC=8,$ and $AC=9$ . If $\triangle DEF \sim \triangle ABC$ and the perimeter of $\triangle DEF$ is $48$ , what is the length of the side $EF$ corresponding to $BC$ ?