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
ve : a) ba diem m,n,p thang hang .b)ba diem c,e,d thang hang sao cho diem e nam giua hai diem cvad .c)ba diem t,q,r khong thang hang
cho abc tren 1/2 bo ac khong chua diem b ve tia ax sao cho cax bang acb tren 1/2 mat phang bo ab khong chua diem c ve tia ay sao cho bay bang abc
a] giai thich vi sao 3 diem x a y thang hang
b]qua c ke duong thang d vuong goc duong thang d co vuong goc xy khong vi sao
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 nam diem phan biet A;B;C;D;E sao cho 3 diem ABC thang hang ; 3 diem BCD CUNG THANG HANG ; CON 3 DIEM BCE khong thang hang a. co bao nhieu duong thang trong hinh ve
b. co bao nhieu doan thang ; doc ten cac doan thANG TRONG hinh ve
( VỀ CÁC ĐƯỜNG THẲNG SAO CHO MỖI ĐƯỜNG THẲNG ĐI QUA ÍT NHẤT HAI TRONG 5 ĐIỂM NÓI TRÊN)
giải giúp mình nha
ve 3 diem A,B,C thang hang sao cho
a. diem A khong nam giua 2 diem B,C
b. diem A nam giua 2 diem B,C
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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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.