Các câu hỏi tương tự
goi A,B la hai diem tren tia Ox . biet OA= 8cm ; AB = 2cm tinh OB. bai toan co may dap so ?
goi A va B la hai diem tren tia Ox . Biet OA = 8cm, AB = 2cm , tinh OB . Bai toan co may dap so ?
Goi A,B la2 diem tren tia Ox . Biet OA = 8cm; AB = 2cm, tinh OB. Bai toan co may dap so?
Goi A,B la hai dien tren Tia Ox.Biet Oa=8cm,AB=2cm,tinh Ob.Bai toan co may dap so?
Tren tia Ox lay hai diem A va B sao cho OA = 3cm, OB = 6cm
a) Diem A co nam giua O va B khong ? Vi sao ?
b) Tinh do dai doan thang AB
c) DIem A co phai la trung diem cua OB khong ? Vi sao ?
d) Goi P la trung diem cua doan thang OA, Q la trung diem cua doan thang AB. Chung to OB = 2PQ.
tren tia Ox lay hai diem AvaB sao cho OA =2cm OB =8 cm
a) tinh do dai doan AB
b) goi M la trung diem cua doanOB . chung to rang diem Ala trung diem cua doan OM
tren tia ox cho doan thang oa=4cm; ob = 2cm hoi a) trong ba diem o;a;b thi dien nao nam giua hai diem con lai b)chung to diem b la trung dien cua doan thang oa c) ve tia oy la tia doi cua tia ox tren tia oy lay dien c sao cho oc =3 so sanh bc va oa d) goi diem d la trung diem cua doan thang oc tinh do dai doan thang bd
Bai 1:toan giai
Cho diem O thuoc duong thang xy.Tren tia O lay diem A,sao cho OA=1cm,tren tia Oy lay diem B,C sao cho OB=3cm,OC=2cm
a) tinh do dai doan thang BC,AC
b) chung minh rang B la trung diem cua doan thang AC
c) goi M la trung diem cua doan thang BC.tinh BM,OM
Ve duong thang xy va Ola mot diem nam tren duong thang .Tren tia Ox lay diem A,tren tia Oy lay diem B sao cho OA=2cm,OB=5cm
a)Tinh do dai AB?
b)Tren tia doi cua tia Ox lay diemN sao cho ON=2ON. Goi M la trung diem cua AB .Tinh do dai MN?