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Determine $BC$.
Mathematics 0580 · IGCSE · Similarity
Similarity — practice question
Triangles $ABC$ and $DEF$ are mathematically similar. In triangle $ABC$, $AB = 51\text{ cm}$. In triangle $DEF$, $DE = 6\text{ cm}$ and the base $EF = 4\text{ cm}$. The sketch is not drawn to scale.