Câu 1: Vẽ hình theo các diễn đạt sau đây: - Vẽ hai đường thẳng xx’ và yy’ cắt nhau ở O. - Lấy A trên tia Ox, B trên tia Oy vẽ đường thẳng tt’ qua O cắt đoạn thẳng AB ở C. - Vẽ đường thẳng uv qua C cắt tia Oy tại D sao cho D nằm giữa hai điểm O và B. - Kể tên các tia đối nhau gốc A, các tia trùng nhau gốc A. Câu 2: Trên tia Ox xác định hai điểm E và F sao cho OE = 5cm, OF = 8cm. a) Trong ba điểm O, E, F điểm nào nằm giữa hai điểm còn lại? Vì sao? b) Tính độ dài đoạn thẳng EF. c) Trên tia đối của tia Ox lấy điểm D sao cho OD =1cm. Tính đoạn DE. d) So sánh độ dài đoạn DE và FE.

Các câu hỏi liên quan

1}They think that he was a spy. (thought) A: It is thought to be a spy. B: It is thought that he had been a spy. C: He is thought to have been a spy. D: He is thought to be a spy. 2}Tom: Can I have a look at that pullover, please?” Sue: “_______” A: Sorry, it is out of stock. B: Which one? This one? C: Can I help you? D: It’s much cheaper 3]Air (23)…………..is the cause of ill-health in human beings. In a lot of countries, there are laws limiting the amount of smoke which factories can (24)…………..although there is not enough information on the effects of smoke on the atmosphere. Doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars also (25)………….. air pollution in most cities. The lead in petrol produces a poisonous gas, which is often (26)…………..in busy streets circled by buildings. Children who live in areas where there is (27)…………..lead in the atmosphere cannot think as quickly as other children, and are clumsy when they use their hands. Question 25. A: increasing B: increases C: to increase D: increase 4]They said that the car driver was driving very fast at the time of the crash. A: The car driver was said to drive very fast at the time of the crash. B: The car driver is said to be driving very fast at the time of the crash. C: The car driver is said to drive very fast at the time of the crash. D: The car driver was said to be driving very fast at the time of the crash. 5]My parents are very proud _________ my result. A: with B: of C: at D: from In remote communities, it’s important to refill stocks before the winter sets in. A: empty B: repeat C: remake D: replenish