Câu 2: (6 điểm) Trên cùng một nửa mặt phẳng bờ chứa tia Ox; vẽ tia Oy và Oz sao cho 𝑥𝑂𝑧 ̂=30° ; 𝑥𝑂𝑦 ̂=60°. a) Tia Oz có nằm giữa hai tia Ox và Oy không ? b) Tính góc 𝑧𝑂𝑦 ̂ ? So sánh hai góc 𝑧𝑂𝑦 ̂ 𝑣à 𝑥𝑂𝑧 ̂ ? c) Tia Oz có phải tia phân giác của góc 𝑥𝑂𝑦 ̂ hay không ? d) Vẽ tia Ot là tia đối của tia Oy và tia Om là tia đối của tia Oz. Kể tên các cặp góc kề bù trong hình vẽ ? e) Tính số đo 𝑚𝑂𝑡 ̂?

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