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một hình chữ nhật có chu vi bằng chu vi hình vuông có cạnh bằng 16 cm biết chiều dài hơn chiều rộng 8 cm Tính diện tích hình chữ nhật đó đó
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một hình chữ nhật có chu vi bằng chu vi hình vuông có cạnh bằng 16 cm biết chiều dài hơn chiều rộng...
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