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19 tháng 11 2017

ttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt

11 tháng 11 2019

Vẽ đoạn thẳng cho biết độ dài

a, Các tia trùng với tia OB là: AB; AC; OC.

b, Ox và By không phải là 2 tia đối nhau vì 2 tia này không có chung gốc.

c, Các đoạn thẳng trên đường thẳng xy: AO; AB; AC; OB; OC; BC.

29 tháng 3 2017

AB=5cm , Am=3 ,BN=1 sua loi