Các câu hỏi tương tự
Cho doan thang AB =7cm Trên tia ABlay diêm C va D sao cho AC=3cm AD=6, AD=6cm
a, Tinh CB,BD,CD
b,Trong 4 diem A , B,C,D diem nao la trung diem cua doan thang nao? tai sao?
c, Trung diem E cua doan thang AB cach C mot khoang bang bao nhieu ?
giai ho cac ban oi
Bai1.Thay cac chu x,y boi cac so thich hop de so 71x1y chia het choa.2,3va5b.2,5va9Bai2.a.N1+21+22+23+....+2100b.3x.3243c.x chia het cho 12; x chia het cho 25;chia het cho 30 va 0x800d.-1387-(25-1367)-55e.-8+|x|-12Bai3.tren duong thang Ox lan luot lay hai diem A vaB sao cho OA4cm.OB8cm.a.Ke ten cac doan thang trong hinhb.Tinh ABc.Tim tren hinh ve diem la trung diem cua doan thangBai4.Cho doan thang AB7cm.Tren tia AB lay hai diem C va D sao cho AC3cm;AD6cm.a.Tinh CB,BD,CDb.Trong 4 diem A,B,C,D d...
Đọc tiếp
Bai1.Thay cac chu x,y boi cac so thich hop de so 71x1y chia het cho
a.2,3va5
b.2,5va9
Bai2.
a.N=1+21+22+23+....+2100
b.3x.3=243
c.x chia het cho 12; x chia het cho 25;chia het cho 30 va 0<x800
d.-1387-(25-1367)-55
e.-8+|x|=-12
Bai3.tren duong thang Ox lan luot lay hai diem A vaB sao cho OA=4cm.OB=8cm.
a.Ke ten cac doan thang trong hinh
b.Tinh AB
c.Tim tren hinh ve diem la trung diem cua doan thang
Bai4.Cho doan thang AB=7cm.Tren tia AB lay hai diem C va D sao cho AC=3cm;AD=6cm.
a.Tinh CB,BD,CD
b.Trong 4 diem A,B,C,D diem nao la trung diem cua doan thang nao ? Tai sao?
c.Trung diem E cua doan thang AB cach C mot khoang bang bao nhieu?
Cac ban oi giup mik voi mai mik di hoc roi
cho diem C la trung diem cua doan thang AB=64cm,tren doan thang CA lay diem D sao cho CD=15cm
a,tinh BD,DA
b,diem D la trung diem cua doan nao
cho doan thang AB bang 10cm va diem C thuoc doan thang AB. Biet AC bang 5
a, Diem C co la trung diem cua AC ko vi sao
b,Tren tia doi cua tia BC,lay D sao cho BD bang 3cm. Goi M,N,I lan luot la trung diem cua doaan thang CB, BD,MN. Tinh AI
Cho doan thang AB=8cm.Goi M la trung diem cua doan thang AB. Tren doan thang AB lay c,d sao cho AC=BD=3cm.
a) Tinh CD
b) Diem M co la trung diem cua doan thang CD khong ? Vi sao ?
Tren tia ox lay 2 diem A,B sao cho OA=3cm,OB=6cm
a, trong ba diem O,A,B diem nao nam giua hai diem con lai ? Vi sao
b,tinh AB
c, diem A ci phai la trung diem cua doan thang ob khong ? Vi sao
d, goi I la trung diem cua doan thang OA,Kla trung diem cua doan thang AB.tinh IK
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
tren tia Ox lay hai diem A,B sao cho OA = 3cm, OB = 6cm
a) trong ba diem O, A, B diem nao nam giua hai diem con lai
b) Tinh AB
c) Diem A co phai la trung diem cua doan OB khong? vi sao?
d) goi I la trung diem cua doan thang OA, K la trung diem cua doan thang AB. Tinh IK
ai ve hinh duoc thi ve luon ho toi nhe!
cho tia ox goi a la mot diem tren tia ox sao cho oa = 3cm tren tia ax lay diem b sao cho ab=5cm tren tia doi cua tia bx lay diem c sao cho bc= 4cm
a.trong ba diem a ,b,c diem nao nam giua hai diem con lai? vi sao?
b. tinh do dai doan thang AC
c. diemC co phai la trung diem cua doan thang OB hay khong? VI SAO?