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Thanhtrung2704
1 năm trước
Cho đg tròn (O;R) có đg kính AB cố định . Trên tia đối của AB lấy điểm C . Qua C kẻ đg thẳng d vuông góc với CA . Lấy điểm M bất kì trên đg tròn O ko trùng với A;B . Tia BM cắt đg thẳng d tại P. Tia CM cắt đg tròn O tại điểm thứ hai là Q . Cm tứ giác ACPM là tứ giác nội tiếp
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