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Euclidean 2Dmedium
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In △ABC\triangle ABC△ABC, the side lengths are AB=7,BC=8,AB=7, BC=8,AB=7,BC=8, and AC=9AC=9AC=9. If △DEF∼△ABC\triangle DEF \sim \triangle ABC△DEF∼△ABC and the perimeter of △DEF\triangle DEF△DEF is 484848, what is the length of the side EFEFEF corresponding to BCBCBC?