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20nguyenhoangkimngan91
2 năm trước
cho hình vuông ABCD,trên cạnh BC lấy I bấy kì,qua A vẽ đường thẳng d vuông góc với AI,d cắt đường thẳng DC và BC lần lược tại E và K a) tam giác AIK đồng dạng tam giác DEA b)AE2=ED.IK c)Biết AB =12 cm,BI=19cm.Tính AK
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