a/Cho ba diem A,B,C thang hang thi co may truong hop hinh ve?

b/Trong moi truong hop,co may diem nam giua hai diem con lai?

c/Hay noi cach ve ba diem khong thang hang

a/Cho 3 diem A,A,C thang hang thi co may truong hop hinh ve?

b/Trong moi truong hop,co may diem nap giua hai diem con lai?

c/Hay noi cach ve ba diem khong thang hang.

Cho 4 điểm A,B,C,D thang hang . Biet do Đại cac doan thang AB bang 3cm , AC bang 6cm , AD bang10cm ( thu tu ABCD tu trai qua phai )

a) diem B co phai la truong diem cua Dian thang AC khong ? Vi sao

b) trong 3 diem B,C,D diem nao nam giua 2 diem con lai

a) ve nam diem M,N,P,Q,R sao cho ba diem M,N,P thang hang,ba diem N,P,Q thang hang ,con ba diem N,P,R khong thang hang b) ke cac duong thang di qua cac cap diem.Co bao nhieu duong thang,ke ten cac duong thang do c)co bao nhieu doan thang?ke ten cac doan thang do d)ke ten cac tia goc P.Trong cac tia do chi ra hai tia doi nhau ? hai tia trung nhau?

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!

Ve 5 diem A,B,C,D sao cho 3 diem A,B,C thang hang, 3 diem B,C,D thang hang, 3 diem C,D,E khong thang hang

a) Giai thich vi sao 3 diem A,B,D thang hang

b) Tren hinh ve hay tim diem nam giua 2 diem con lai

cho 5 diem A B C D E sao cho 3 diem a b c thang hang ba diem b c d thang hang ba diem b c e khong thang hang a) giai thich vi sao ba diem a b d thang hang? b)ke duong thang moi duong thang di qua it nhat 5 diem tren c)ke ten cac duong thang trong hinh ve

Ve tren cung mot hinh theo cach dien dat sau :

a)Ve 4 diem A ,B ,C D sao cho C nam giua A, B va 3 diem A, B D ko thang hang . Hay ve va ke ten duong thang (phan biet) di qua tung cap diem .

b) Ve diem E sao cho E va D nam khac phia doi voi A . Ve diem F sao cho C,E,F thang hang va F thuoc duong thang DB

 bai 1 : cho 3 diem V, A , T thang hang . diem nao nam giua 2 diem con lai neu :

TV + VA = TA 

bai 2 : tren 1 duong thang , hay ve 3 diem V , A , T sao cho TA = 1 cm , VA = 3 cm . hoi diem nao nam giua 2 diem con lai