Vẽ hình theo cách diễn đạt bằng lời. Sau đó trả lời cõu hỏi sau:
a. - Vẽ tia Oa
- Trên cùng m...
![subject](/tpl/images/cats/mat.png)
Mathematics, 25.07.2021 06:50 Emiann222
Vẽ hình theo cách diễn đạt bằng lời. Sau đó trả lời cõu hỏi sau:
a. - Vẽ tia Oa
- Trên cùng một nửa mặt phẳng có bờ chứa tia Oa, vẽ các tia Ob, Oc sao cho aOb = 450, aOc = 1100
- Trong 3 tia Oa, Ob, Oc tia nào nằm giữa hai tia còn lại?Vỡ sao?
b. - Vẽ tia Ox, Oy sao cho xOy = 800
- Vẽ tia Ot nằm giữa hai tia Ox, Oy sao cho xOt = 400
- Tia Ot có là tia phân giác của góc xOy không? Vì sao?
c. + Vẽ đoạn AB = 6cm
+ Vẽ đường tròn (A; 3cm)
+ Vẽ đường tròn (B; 4cm)
+ Đường tròn (A; 3cm) cắt (B; 4cm) tại C và D
+ Tính chu vi tam giác ABC và tam giác ADB
d. Vẽ tam giác MNP biết MN = 5cm; NP = 3cm; PM = 7cm
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