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Mathematics, 14.06.2021 17:20 Lilshawn1
Cho tam giác abc có bm, cn là đường trung tuyến . Nếu bm = cn chứng minh tam giác abc cân . Từ đó rút ra định lý trong một tam giác nếu hai đường trung tuyến bằng nhau thì tam giác đó là tam giác cân
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Cho tam giác abc có bm, cn là đường trung tuyến . Nếu bm = cn chứng minh tam giác abc cân . Từ đó rú...
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