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colenkhanhlinhoi
2 năm trước
Bài 4: Cho góc xOy. Trên tia Ox lấy điểm A, trên tia Oy lấy điểm B sao cho OA = OB. Qua A kẻ đường thẳng vuông góc với Oy, qua B kẻ đường thẳng vuông góc với Ox, chúng cắt nhau ở M. Chứng minh: a, MA = MB b) OM là tia phân giác của góc xOy
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