cho truoc n diem trong do k co 3 diem nao thang hang ve duong thang di qua cac cap diem. Tim n biet rang neu co them 1 diem (k thang hang voi bat cu 2 diem nao trong tong so n diem da cho) thi so duong thang ve dc tang them 8 duong 

cho truoc 6 diem a,b,c,d,e,g.ve cac duong thang di qua cac cap diem t rong do ;a)6 diem da cho ko co 3 diem nao thang hang ;b)6 diem da cho co nhung diem nao thang hang

cho truoc 1 so diem trong do ko co 3 diem thang hang .ve cac duong thang di qua cac cap diem .biet tong so cac duong thang ve duoc la 36 . tinh so diem cho truoc .

cho 15 diem phan biet (trong do ko co 3 diem nao thanh hang) ,cu qua hai diem ve duoc 1 duong thang. tinh so duong thang di qua cac cap diem

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!

1. Tren 1 duong thang xy lay 4 diem phan biet A,B,C,D hay chi ra cac tia doi nhau 

2. cho 10 diem trong do khong co ba diem thang hang . Cu qua hai diem ta ve duoc 1 duong thang . Hoi co tat ca bao nhieu duong thang?

3. cho n diem trong do khong co ba diem nao thang hang . Cu qua hai diem trong so cac diem do ve duoc 1 duong thang. Biet rang co 435 duong thang tao thanh .Tim n?

cho 6 diem trong do ko co 3 diem nao thang hang . so tat ca cac duong thang di qua 2 diem trong 6 diem da cho la

cho 6 diem phan biet , trong do ko co 3 diem nao thang hang. Ve dc bao nhieu duong thang di qua cac cap diem?

cho 6 diem phan biet, trong do ko co 3 diem nao thang hang. Ve dc bao nhieu duong thang di qua cac cap diem