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Mathematics, 28.11.2021 14:20, rpegler4
Cho hình chữ nhật ABCD chứng minh AC=BD và AC cắt BC tại trung điểm mỗi đường
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Cho hình chữ nhật ABCD chứng minh AC=BD và AC cắt BC tại trung điểm mỗi đường...
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