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loanle20081980
2 năm trước
Cho tam giác ABC có 3 góc nhọn nội tiếp đường tròn tâm O.các đường cao AD,BE,CF cắt nhau tại H, gọi K là điểm đối xứng với H qua AC Vẽ hình hộ thôi ạ
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