ve hinh theo cach dien dat sau
a, diem C nam tren duong thang a
b, diem B nam ngoai duong thang b
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 hinh theo cach dien dat sau
ve tia Ox va Oy doi nhau
lay A nam ngoai duong thang xy, v doan thang AO
lay diem B thuoc tia Ox ( B khac O ) ve tia AB
ve K la trung diem cua doan thang OA
Ve hinh theo cach dien dat sau: Tren duong thang a lay hai diem B va N. Ve ba diem A,M,C khong thang hang
ve hinh theo cach dien dat bang loi sau
a, ve duong thang MN
b, ve tia MN
c, diem C nam tren tia MN,co nhung kha nang nao xay ra?.Doi voi moi truong hop do hay chi ra diem
nam giua 2 diem con lai
cho duong thang xy, cac diem B va C nam tren xy, diem A nam ngoai xy. Hãy neu cach ve duong thang di qua A va song song voi BC.
Viet han cach ve ra ho minh nha !!!! ^_^
Cho 10 diem phan biet,qua 2 diem ta ve mot duong thang
a)Co the ve duoc bao nhieu duong thang?neu cach lam
b)Neu co 5 diem cùng nam tren mot duong thang ngoai ra khong co 3 diem nao thang hang thi ve duoc it nhat bao nhieu duong thang?neu cach lam.
Bai 2:
a/Ve hinh theo cach dien dat sau
-Ve XOy=70do
-Ve diem A nam trong goc XOy
-Ve duong thang d1 di qua diem A va song song voi Ox
-Ve duong thang d2 di qua diem A va vuong goc voi Ox
Goi B la giao diem cua d1 va Oy
b/Hoi d1 va d2 co vuong goc voi nhau khong?Vi sao?
c/Tinh OAB?
cho 3 diem A,B,C khong thang hang
a)Ve duong thang AB, doan thang BC,tia AC.Lay dien M tren duong thang AB sao cho B,M nam cung phia so voi diem A
b)Ve tia Ax la tia doi cua tia AC.Lay diem N sao cho A la trung diem cua doan CN(ve tren cung 1 hinh)
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Cho doan thang d . Ve them 4 diem M,N ,P,Q theo thu tu ay . Ve diem A khong nam tren duong thang d.
a) Ve tia AM, tia QA
b)Ve duong thang AN va duong thang AP.
c) hinh tren co bao nhieu doan thang?