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?
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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 cac diem A va B thuoc duong thang a,diem C nam giua A va B.diem D nam giua C va B.cau hoi;a,tim tren hinh ve cac tia doi nhau goc C.b,dung lap luan chung to C nam giua A va B.c,tren hinh ve co bao nhieu doan thang?la nhung doan thang nao
cho 3 diem M N P theo thu tu do nam tren duong thang xy hoi so doan thang co trong hinh ve la bao nhieu
ve 2 duong thang xy va tz cat nhau tai diem O.lay diem A thuoc tia Ox, lay diem B thuoc tia Ot. Ve duong thang di wa 2 diem A va B. Ve tia Am cat tia Oz tai N. Hinh ve co bao nhieu doan thang?
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 2 duong thang xy va zt cat nhau tai O lay A thuoc tia Oz sao cho OA=OC=2cm va OD=2OB tren hinh vua ve co nhung doan thang nao? co diem nao la turng diem cua doan thang khong? vi sao?
ve 2 duong thang xy va zt cat nhau tai O lay A thuoc tia Oz sao cho OA=OC=2cm va OD=2OB tren hinh vua ve co nhung doan thang nao? co diem nao la trung diem cua doan thang khong? vi sao?
trong mat phang cho 10 diem phan biet, trong do khong co 3 diem nao thang hang.Hoi co the ve duoc bao nhieu tia, bao nhieu doan thang, bao nhieu duong thang? (neu trong diem phan biet do co 5 diem thang hang thi ve duoc bao nhieu tia, bao mhieu doan thang, bao nhieu duong thang).
Nếu ko có 3 điểm nào thẳng hàng thì vẽ đc 45 đường thẳng và 90 tia
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cho 3 diem M N P theo thu tu do nam tren duong thang xy so doan thang ci tren hinh ve la so cap tia doi nhau co tren hinh ve la