Ve duong thang a , A thuoc a , B thuoc a , C thuoc a , D khong thuoc a
a, Hay ke tat ca bao nhieu duong thang phan biet.
b, Viet ten cac duong thang do.
c, D la giao diem cua duong thang nao ?
Ve duong thang a, lay A thuoc a, B thuoc a, C thuoc a, D khong thuoc a. Ve cac duong thang di qua 2 trong 4 diem da cho. Ve duoc bao nhieu duong thang ( phan biet )? Viet ten cac duong thang do.
cho duong thang m, diem A thuoc duong thang m và diem B khong thuoc duong thang m
a, ve hinh va viet ky hieu
b, co nhung diem khac diem A ma cung thuoc duong thang m khong? hay ve hai diem nhu the va ve ky hieu.
c, co nhung diem khong thuoc duong thang m ma khac voi diem B khong? hay ve hai diem nhu the va viet ky hieu
b) co nhung diem khac A ma cung thuoc duong thang m khong?
nhung diem khac A do co trong hinh ve hay la ta ve them vay ?
1. Lay 4 diem A, B, C, D trong do khong co 3 diem nao thang hang. Ke cac duong thang di qua cac cap diem. Co bao nhieu duong thang tat ca? do la nhung duong thang nao?
2. Lay 4diem M,N,P,Q trong do 3 diem M,N,P thang hang va diem Q nam ngoai duong thang do. ke caacacc duong thang di qua cac cap diem. co bao nhieu duong thang phan biet? viet ten cac duong thang do
mong cac ban giai ho minh!
cho ba diem a b c thang hang va d khong thuoc duong thang do . hoi co the ve duoc tat ca bao nhieu duong thang di qua hai trong bon diem noi tren ?
3 diem thang hang tao thanh 1 duong thang goc.
diem D nam ngoai duoc thang
nen lay diem D lam mut de ve cac duong thang di qua 2 trong 4 diem co 3 diem nen co 3 duong thang.
cho minh nhe
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 duong thang m diem A thuoc duong thang m diem b khong thuoc duong thang m
a ve hinh va viet ki hieu
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 ?
ve diem m,n thuoc duong thang a .Ve diem a khong thuoc duong thang a .
d di qua diem a va cat duong thang a tai diem B nam giua diem m,n
cho duong thang xy.tren duong thang xy co 2017 diem,3 diem a,b,c khong thuoc duong thang xy va ko thang hang va bat ki diem nao tren dương thang xy deu khong thang hang voi hai trong ba diem a,b,c.qua hai diem bát ki nguoi ta ke mot duoc thang.hoi co bao nhieu duong thang?