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Mathematics, 05.11.2021 19:30 mathiscool51

Cho tam giác ABCD. Từ một điểm E trên cạnh AC vẽ đường thằng song song với BC cắt AB tại F và đường thằng song song với AB cắt BC tại D. Giả sử AE=BF a) Chứng minh tam giác AED cân
b)Chứng minh AD là phân giác của góc A

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Cho tam giác ABCD. Từ một điểm E trên cạnh AC vẽ đường thằng song song với BC cắt AB tại F và đường...

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