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Cho tam giác ABC vuông tại A có AB = 18cm, BC = 30cm. Biết ΔA′B ′C′∼ΔABC và diện tích tam giác A'B'C' bằng 150cm2.Tính các cạnh của tam giác A'B'C'. Đáp số: A'B' = cm, A'C' = cm, B'C' = cm
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