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dung2000cn
2 năm trước
Cho tam giác ABC có góc A=90 độ(AB<AC).Kẻ AH vuông góc BC.Trên tia đối của tia HA lấy điểm D sao cho HD=HA.Trên tia BC lấy điểm K sao cho HK=HB a,Chứng minh tam giác AHK=tam giác DHB b,Chứng minh AK//BD c,Chứng minh AB=DB d,Kẻ KI vuông góc AC của tam giác AKC.Chứng minh ba điểm D,K,I thẳng hàng Giúp mik với!!!!!!!!!!!!Mik đang cần gấp!!!!!!!!!!!!!!!!
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