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thanhhungbui33
2 năm trước
Help me pls Cho tam giác ABC có ∠A = 70o, điểm M thuộc cạnh BC. Vẽ điểm D đối xứng với M qua AB, vẽ điểm E đối xứng với M qua AC. a, Chứng minh rằng AD = AE b, Tính số đo góc ∠(DAE)
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