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hanhiu
2 năm trước
cho hình vuông ABCD. M là một điểm tùy ý trên BC (M khác B)tia AM căt DC tại P . Trên tia đối của tia DC lấy N sao cho BM=DN a/tam giác ABM và tam giác PCM đồng dạng b/Qua A vẽ đường thẳng vuông góc với MN cắt AD tại I . Chứng minh AH.AQ=AI.AD
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