cho duong thang xy va diem O nam tren duong thang xy tren tia Ox lay diem E sao cho OE=3cm.tren tia Oy lay diem G sao cho EG=6cm a)tren 3 diem O,E,G thi diem nao nam giua hai diem con lai ? vi sao b) tinh do dai doan thang OG. tu do cho biet diem O co la trung diem cua doan thang EG khong?

cho diem thang xy va diem khong nam tren duong thang do .tren Ox lay diem E sao cho OE bang 4cm tren tia so OY  lay diem G sao cho G bang 8cm

a, Diem nao nam giua hai diem con lai ? vi sao ?

b,Tinh doan thang OG?

c,chung to diem o la trung diem?

cho duong thang xy ,va diem O nam tren duong thang do.tren tia Ox lay diem Esao cho OE=4cm.tren tia Oy lay diem G sao cho OG =4cm.Chung to O la trung diem cua doan thang EG.

              LOI GIAI DAY DU NHA

ve duong thang xy lay diem o tren duong thang xy lay diem m thuoc tia oy lay diem n thuoc tia ox trong ba diem m o n thi diem nao nam giua hai diem con lai

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?

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

Ve tia Ox. Tren tia Ox lay 2 diem E va F sao cho OE= 2cm, OF= 6cm

a) Trong 3 diem O,E,F diem nao nam giua 2 diem con lai? Vi sao? Tinh EF

b) Goi I,K lan luot la trung diem cua OE va EF. Tinh do dai doan thang EK va IK?

c) Lay diem M sao cho O la trung diem cua ME. Hoi E co la trung diem cua MF khong?