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

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 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

1 . ve 4 tia chung goc , roi chi ra cac tia nam giua cac tia khac .

2. ve duong thang xy lay 2 diem E va F thuoc 2 nua mat phang doi nhau xy . goi ten cac nua mat phang tren hinh .

Ve tia Ox va tia Oy doi nhau.Ve diem A thuoc Ox,cac diem B va C thuoc tia Oy (B nam giua O va C)

a,Hay ke ten cac tia trung voi tia OB

b,Tia Ox va tia By co phai la 2 tia doi nhau ko?Vi sao?

c,Hay ke ten cac doan thang tren duong thang xy

Ve duong thang va mn cat nhau tai O . Trên tia Oxy lay diem A, tren tia Oy lay diem C( A,C khac O ). Trên tia doi cua tia Ox lay diem B . Lay diem Q bat ki , không thuoc mn . Hay ve ba diem B,Q,P thang hang sao cho P thuoc mn

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.ve duong thang xy.lay diem O tren duong thang xy.lay diem M thuoc tia Oy.lay diem N thuoc tia Ox.

a)viet ten 2 tia doi nhau goc O.

b)trong ba diem M,O,N thi diem nao nam giua 2 diem con lai.