Các câu hỏi tương tự
ve duong thang xy lay diem o tren duong thang xy lay diem m thuoc tia oy lay diem n thuoc tia ox trong ba diem m o n thi diem nao nam giua hai diem con lai
Ve hai diem A va B cung thuoc duong thang xy va diem C khong thuoc duong thang xy .Ve tia BC
a.ke ten cac doan thang
b.ke ten hai tia doi nhau goc B
c.ve diem D nam giua hai diem A va B . hoi hai tia DX va BY co la hai tia doi nhau ko ? vi sao ?
Cho doan thang AB, Diem O thuoc tia doi cua tia AB. Goi M, N thu tu la trung diem cua OA, OB.
a) Chung to rang OA < OB
b) Trong ba diem O, M, N diem nao nam giua hai diem con lai?
c) Chung to rang do dai doan thang MN khong phu thuoc vao vi tri cua diem O(O thuoc tia doi cua tia AB)
Cau 5: Trong cac khang dinh sau, khang dinh nao dung, khang dinh nao sai?1.Ba diem phan biet la ba diem thang hang.2.Voi ba diem phan biet luon co hai diem nam ve cung phia doi voi diem con lai.3.Voi ba diem thang hang phan biet luon co hai diem nam khac phia voi diem con lai.4.Voi ba diem A,B,C thang hang thi diem B luon nam giua hai diem A,C.5.Co mot va chi mot duong thang di qua hai diem (phan biet) cho truoc.6.Hai duong thang phan biet thi song song voi nhau.7.Hai tia chung goc thi cung nam...
Đọc tiếp
Cau 5: Trong cac khang dinh sau, khang dinh nao dung, khang dinh nao sai?
1.Ba diem phan biet la ba diem thang hang.
2.Voi ba diem phan biet luon co hai diem nam ve cung phia doi voi diem con lai.
3.Voi ba diem thang hang phan biet luon co hai diem nam khac phia voi diem con lai.
4.Voi ba diem A,B,C thang hang thi diem B luon nam giua hai diem A,C.
5.Co mot va chi mot duong thang di qua hai diem (phan biet) cho truoc.
6.Hai duong thang phan biet thi song song voi nhau.
7.Hai tia chung goc thi cung nam tren mot duong thang.
8.Hai tia chung goc thi doi nhau
9.Neu diem M nam giua diem A,B thi no la trung diem cua doan thang AB.
10.Neu MA=MB thi M la trung diem cua doan thang AB.
11.Neu MA+MB= AB va MA=MB thi M la trung diem cua doan thang AB.
cho cac diem A va B thuoc duong thang a .diem C nam giua A va B .diem D nam giua C va B
a)tim tren duong thang a nam cung phia doi voi diem C diem nam khac phia doi voi diem C
b) tim tren hinh ve cac tia doi nhau goc C ,cac tia trung nhau goc C
c) vi sao diem C nam giua A va D
Goi M la diem nam giua A,B.Lay diem O khong nam tren duong thang AB. Ve ba tia OA, OB, OM.
Hoi tia nao nam giua hai tia con lai?
Ve duong thang xy di qua diem M, lay hai diem P va Q sao cho diem P thuoc tia Mx, diem Q thuoc tia Py nhung khong thuoc tia My. hay viet ten
a) Tia trung voi tia Py
b) cac tia goc Q trung nhau
c) Cac tia goc Q doi nhau
d) Tat ca cac doan thang trong hinh
Cho doan thang AB.Diem O thuoc tia doi cua AB.Goi M,Ntheo thu tu la trung diem cua OA,OB
a,Chung minh OA<OB
b,Trong 3 diem M,O,N diem nao nam giua 2 diem con lai
c,Chung to rang do dai doan thang MN khong phu thuoc vao vi ri diem O(O thuoc tia doi cua AB)
Giup minh voi
Cho doan thang AB, diem O thuoc tia doi cua tia AB. Goi M,N thu tu la trung diem cua OA,OB.
a, Chung to rang OA<OB
b, Trong ba diem O,M,N diem nao nam giua hai diem con lai?
Chung to rang do dai doan thang MN ko phu thuoc vao vi tri cua diem O[O thuoc tia doi cua tia AB]