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)
Ve hinh theo các cách diem dat sau : cho 3 diem A, B,C không thang hang . Ve tia AB ,doan thang AC, duong thang BC . Ve tia Bx cat doan AC tai D cho D la trung diem cua doan thang Ac
bai 1;cho 2 tia Ox vaOy khong doi nhau
a,ve duong thang aa' cat tia Ox va Oy lan luot tai A va B khac O.Ve diem M nam giua A va B.Ve tia OM.Ve tia ON la tia doi cua tia OM
b,chi ra nhung doan thang tren hinh
c,chi ra 3 diem thang hang tren hinh
bai 2;ve tia Ox.Ve tren tia Ox voi OA la 3cm;OB la 5cm;OC la 7cm
CMR diem B la trung diem doan thang AC
cho 3 diem A,B,C khong thang hang.Ve 2 tia AB , AC
Ve duong thang a di qua 2 diem B va C
Ve 2 tia Ay cat duong thang BC tai diem N ( N khong nam giua B va C )
Ve tia doi cua tia Ay.Tren tia doi cua Ay lay diem M sao cho AM=3cm
Giai chi tiet rui mik like nha
lay ba diem khong thang hang a,b,c .ve hai tia ab,ac.ve hai tia ab , ac
a, ve tia ay cat duong thang bc tai diem m nam giua b va c
b,ve tia ay cat duong thang bc tai diem n khong nam giua b va c
-cho ba diem A,B,C khong thang hang
-ve hai tia AB , AC
-ve tia At la tia doi cua tia AC
-LAY diem I la trung diem cua doan thang BC
cho cac duong thang a,b,c .Biet a cat b tai diem A, b cat c tai diem C , a cat c tai diem B
a / chi ra cac doan thang co tren hinh ve
b/ ve tia AD a tia doi cua tia AC ,ve tia BE la tia doi cua tia BC
c/ lay diem M thuoc tia AC .ve tia AM
ve hinh cho to nha
cho 3 diem A,B,C, khong thang hang,ve doan thang BC
ve diem M la trung diem cua doan thang BC
ve tia BA,duong thang AC
ve duong thang AD sao cho M nam giua A va D
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