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hongdiem3105
2 năm trước
GIÚP MK VỚI!!!!!!!!!!!! Cho tam giác ABC có BC=4cm.Trên cạnh AB lấy các điểm D và E sao cho AD=BE.Qua D và qua E,kẻ các đường thẳng song song với BC,cắt AC theo thứ tự ở H và K.Tính tổng DH và EK
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