cho doan AB=8cm.tren tia AB lay diem C ,sao cho Ac=2cm.Trên tia BA lay diem D sao cho BD=3cm.tinh Cb Cd
cho doan ab =8cm.Tren tia AB ta lay diem C sao cho AC=2 cm,tren tiaBA lay diem D sao cho BD= 3cm .Tinh do dai doan thang BC,CD
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
Cho doan thang AB dai 5cm Tren tia Ab lay diem C sao cho AC = 3cm :
a)Tinh CB
b)Tren tia doi cua tia Bc lay diem D sao ch BD = 3cm So sanh CD va AB
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
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
tren tia Ox lay 2 diem Ava B sao cho OA =2cm,OB=6cm
a)Tinh do dai doan thang AB
b)Tren tia doi cua tia AB lay diem C sao cho AC=2OA.Diem A co phai la trung diem cua doan thang CB khong?Vi sao?
tren doan thang AC co do dai 12 cm ,lay diem B sao cho AB=5 cm .a, tinh do dai cua doan thang BC.b,goi M,N lan luot la trung diem cua doan thang AB ,BC . tinh do dai doan thang MN.c, lay diem D thuoc tia doi cua tia CA sao cho CD =7 cm . chung to rang diem C la trung diem cua doan thang BD