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HIeu12345
2 năm trước
cho tam giác ABC vuông cântại B phân giác AM ( M thuộc BC) .kẻ MN vuông góc vs AC (M thuộc A) a,c-m tam giácABM bằg tam giác ANM b,tính ac bt ab bằg 5cm,bc bằg 12cm c,tam giác BNM là tam giác cân
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