Các câu hỏi tương tự
cho diem O thuoc duong dang xy.tren tia Ox lay diem A sao cho OA=3cm,tren tia Oy lay diem B,C sao cho OB=9cm,0C =1cm
a,tinh do dai doan thang AB,BC
b,goi M la trung diem cua doan BC.tinh CM,OM
cho diem o thuoc duong thang xy.tren tia ox lay diem a sao cho oa=3cm,tren tia oy lay diem b,c sao cho ob=9cm,oc=1cm
a tinh do dai doan thang ab;bc
b goi m la trung diem cua doan thang bc.tinh cm,om
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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
tren tia Ox lay hai diem A va B sao cho OA=3cm ,OB=7cm
a)tinh do dai doan AB
b)goi I la trung diem cua doan thang AB.Tinh do dai doan thang OI
c) tren tia doi cua tia Ox Lay diem C sao cho AC=6 cm.HAy giai thich vi sao O la trung diem cua doan thang CA
Tren duong thang x,y lay o.Lay diem a thuoc tia ox,B thuoc tia oy sao cho OA=2cm;OB=2oa
A)Tinh do dai doan AB?
B)Goi Yla trung diem cua OB.Chung minh O la trung diem cua doan thang AI
C) Tren duong thang xy lay 100 diem diem phan biet(khac O,A,B,I).Noi 2 diem ta duoc mot doan thang.Hoi co bao nhieu duong thang tao thanh?
giup minh voi! HELP ME!!!!!
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 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?
cho diem M thuoc duong thang xy . Ten tia Mx lay diem B sao cho MB bang 3cm , tren tia My lay diem C sao cho MC bang 2cm
a. tinh do da doan BC
b. goi O la mot diem nam ngoai duong thang BC . Ke cac doan thang OB , OC , OM . Biet goc BOC bang 90 do, goc BOM bang 60 do . Tinh goc MOC
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