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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,
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1/ đúng
2/ đúng
3/sai thiếu điều kiện M,A,B thẳng hàng
kham khảo
Giải toán trên mạng - Giúp tôi giải toán - Hỏi đáp, thảo luận về toán học - Học toán với OnlineMath
vào thống kê hỏi đáp của mình có chữ màu xanh trong câu trả lời này nhấn zô đó sẽ ra
hc tốt ~:B~
a) Trên tia Ox có OA<OB (3cm<6cm) nên điểm A nằm giữa hai điểm còn lại
b)Vì A Nằm giữa O và B nên
OA+AB=OB
hay 3+AB=6
AB=6-3=3cm
c) VÌ A nằm giữa O,B và OA=AB=3cm nên A là trung điểm của OB
d) Vì I là trung điểm của OA nên
OI=IA=OA/2=3/2=1.5cm
Vì K là trung điểm của AbB nên
AK=KB=AB/2=3/2=1.5cm
Ta có: IA+AK=IK
hay 1.5+1.5=3 (cm)