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Mathematics, 13.06.2021 18:20 einsigcn8481

Cho tam giác abc có bm , cn là hai đường trung tuyến . nếu bm=cn chứng minh tam giác abc cân

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Cho tam giác abc có bm , cn là hai đường trung tuyến . nếu bm=cn chứng minh tam giác abc cân...

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