Mathematics, 27.07.2021 22:50 antisnitch1

Ví dụ 1:Cho tam giác ABC cân (AB = AC) trên tia đối của tia BC lấy điểm D, trên tia đối của tia CB lấy điểm E sao cho CE = BD. Nối A với D và A với E a) So sánh ∠ABD và ∠ACE b) Chứng minh ΔADE cân

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Ví dụ 1:Cho tam giác ABC cân (AB = AC) trên tia đối của tia BC lấy điểm D, trên tia đối của tia CB l...