Tren tia Ax co cac diem B,C,D sao cho AC=1cm,AB=4cm,BD=2cm.Tinh do dai cach BC va CD
cho tam giac ABC co BC=4cm. tren tia doi cua tia BC lay diem D sao cho BD=2cm/ a, tinh do dai CD; b,goi M la chung diem cua CD.tinh do dai BM;c,biet goc DAC bang 112 do .Ãxtia phan giac cua goc BAC va goc BAD. tinh so do goc xAy;d, tren nua mat phang bo la duong thang AC co chua diem D neu ve them n tia goc A phan biet khong trung voi cac tia ÂC,Ã,AB,Ay,AD thi co tat ca bao nhieu goc dinh A va Ay thu tu la
Cho tia ox tren tia ox ve cac diem a b c d sao cho a nam giua b va c b nam giua c d biet oa=5cm od=2cm bc=4cm va ac=2.bd tinh do dai cac doan bd ac
tren tia Ax co cac diem B va C sao cho AB=2cm; BC=3cm.Tinh khoang cach AC
Cho doan thang AB dai 4cm. Tren tia AB lay diem C sao cho AC = 1cm
a, Tinh CB
b, Lay diem D thuoc tia doi cua tia BC sao cho BD = 2cm. Tinh BC
mong cac ban giup, minh can truoc 2h
cho doan thang ab dai 6cm tren tia ab lay diem c sao cho ac=4cm a chung to rang diem c nam giua a va b b tinh do dai doan thang cb c lay diem d thuoc duong thang ab sao cho bd=3cm tinh do dai doan thang cd
Ve tia Ax. Tren tia Ax xac dinh hai diem C va B sao cho B nam giua A va C va AC=8cm, AB=3BC.
a,Tinh do dai cac doan AB,BC
b,Goi M,N,P lan luot la trung diem cac doan AB,AC,BC.
Tinh do dai MN,NP
c, Chung to rang B la trung diem cua NC
Cho doan thang AB dai 5 cm. Tren doan thang AB lay diem C sao cho AC = 3 cm
a, Lay diem D thuoc tia doi cua tia BC sao cho BD = 2 cm. So sanh do dai hai doan thang CD va AB
Mong cac ban giup minh, minh can truoc 9h
