Neu mot duonbg thang di qua trung diem cua mot doan thang khac thi no co phai la duong trung truc khong . vi sao
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chúc bạn học tốt !
chúc bạn học tốt !
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1/ đúng
2/ đúng
3/sai thiếu điều kiện M,A,B thẳng hàng
Không, vì đường thẳng đó chưa đi vuông góc fđt còn lại nên chưa gọi là trung trực CHỈ GỌI LÀ TRUNG TUYẾN THÔI
nhưng đường thẳng phải vuông góc tại trung điểm của đoạn thẳng nữa thì mới là đường trung trực được