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Hoahong983
2 năm trước
Trên cùng một nữa mặt phẳng bờ chứa tia Ox, vẽ hai tia Oy, Oz sao cho xÔy = 30 và xÔz = 100 a) Tính yÔz b) Gọi Ox’ là tia đối của tia Ox. Tính yÔx’ | Cần cả hình vẽ |
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