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luuluongdacbang
2 năm trước
I. TRẮC NGHIỆM. Em hãy khoanh tròn vào chữ cái đứng đầu câu trả lời đúng Câu 2. Trên đường thẳng xy lấy hai điểm A và B phân biệt thì: A. Ax và Ay là hai tia đối nhau. B. AB và BA là hai tia trùng nhau. C. AB và BA là hai tia đối nhau. D. Ax và Bx là hai tia trùng nhau. Câu 3. Cho ba điểm M, N, K thẳng hàng. Biết rằng MN = 7cm, NK = 4 cm, MK = 3cm. Khẳng định nào sau đây là đúng? A. M nằm giữa hai điểm N và K. B. K nằm giữa hai điểm N và M C. N nằm giữa hai điểm M và K. D. Không có điểm nào nằm giữa hai điểm còn lại. Câu 4. Điểm I là trung điểm của đoạn thẳng AB khi: A. IA = IB B. IA = IB và IA + IB = AB C. IA + IB = AB D. IA = IB =2AB Câu 5. Cho ba điểm A, B, C thẳng hàng thì số đoạn thẳng vẽ được từ ba điểm đó là: A. 1 B. 2 C. 3 D. Vô số Câu 6. A là trung điểm của đoạn thẳng CD. Biết CD = 16 cm. Độ dài đoạn thẳng CA là: A. 32 cm B. 8 cm C. 9 cm D. 16 cm
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