Hình học Bài 1.Vẽ các góc theo số đo tương ứng sau: a) góc xOy = 450; b) góc MON = 900 ; c) góc ABC = 1200 Bài 2. Vẽ hai tia Oy, Oz cùng nằm trên nửa mặt phẳng có bờ chứa tia Ox, biết = 500, =1100. a) Trong ba tia Ox, Oy, Oz tia nào nằm giữa hai tia còn lại? Vì sao? b) Tính số đo góc yOz? Bài 3. Trên cùng một nửa mặt phẳng bờ chứa tia Ox, vẽ hai tia Ot và Oy sao cho = 750 và = 1500. Tính góc tOy. Bài 4. Cho góc xOt bằng 300, vẽ góc yOt kề bù với góc xOt. Tính số đo góc yOt? Bài 5. Cho góc bẹt xOy. Vẽ tia Oz sao cho = 75o. Tính góc zOy Bài 6. Trên cùng một nửa mặt phẳng bờ chứa tia Ox, vẽ 2 tia Oy và Oz sao cho = 600, = 1200. a) Trong 3 tia Ox, Oy, Oz tia nào nằm giữa hai tia cũn lại? Vì sao? b) So sánh và ?

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