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maihuynh23092001
1 năm trước
Cho tam giác ABC vuông tại A .Từ một điểm K bất kỳ thuộc cạnh BC vẽ KH vuông AC .Trên tia đối của tia HK lấy điểm I sao cho HI =HK.Chứng minh : a) AB=HK b)tam giác AKI cân c) góc BAK= góc AIK d) tam giác AIC=tam giác AKC
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