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1/ đúng
2/ đúng
3/sai thiếu điều kiện M,A,B thẳng hàng
ta vẽ góc :
a)ta có góc mon = 900
b)==> 750
còn lại bạn tụ giải nha
đến giờ ăn cơm rồi
x z y m n 30'
a)hinh tao thanh boi diem O va 1 phan duong thang bi chia ra boi diem Oduoc goi la 1 tia gốc O
b)diem R bat ki nam tren duong thang xy la goc chung cua 2 tia đối nhau
c)neu diem A nam giua 2 diem B va C thi:
-hai tia......AB và CA........doi nhau
-hai tia CA va ..........CB.............trung nhau
-hai tia BAva BC ........trùng nhau......
bạn nhấn đúng cho mình nhé , cảm ơn,
Câu C
Đúng nhất !!!