ba diem mnam giua mn
ba diem mnam giua mn
tren tia ox lay cac diem m va n sao cho om=3cm ;on=4cm .tren tia doi cuatia no lay diem p sao cho np=2cm .tinh do dai cac doan thang mn va mp
[giai nhanh ; li luan luon cho minh nhe giai chi tiet luon nha]
1, cho doan thang dai 3cm. tren tia AB lay diem I sao cho IA=2cm.
a, tinh IB
b, lay diem C thuoc tia doi cua tia BI sao cho BC = 3cm. tinh IC
2, cho doan thang MN=8cm. goi R la trung diem cua MN
a, Tinh MR, RN
b, lay 2 diem PQ tren doan MN sao cho MB bang NQ =3cm. tinh PR, QR
c, diem R co phai la trung diem cua PQ khong. vi sao
cac ban ve hinh ra gium minh nhe, minh can gap, cam on cac ban nhieu
Cho 3 diem E, F, G sao cho :
a, EF = 2cm, FG = 3cm, EG = 5m. Chung minh ba diem E, F, G thang hang
b, EF = 2cm, FG = 3cm, EG = 4cm. Chung minh ba diem E, F, G khong thang hang
giup minh, minh can gap lam !!!!!
cho doan thang AB bang 8cm C la motoem nam giua AvaB sao cho AC bang 3cm . Goi M la trung diem cua AC goi diem N la trung diem cua CB
a, hoi trong ba diem M,C,N diem nap nam giua 2 diem con lai vi sao
b, goi Ela trung diem cua MN . so sanh doan MN va EB
Trinh bay ro rang nhe . Minh dang can gap
Tren tia Ox,lay hai diem A va B sao cho OA=7cm;OB=2cm
a)Diem B co nam giua hai diem O va A khong?Vi sao?
b)Tinh do dai doan thang AB.
c)Tren tia doi cua tia Ox lay diem M sao cho OM=3cm.Goi N la trung diem cua OB.Hay so sanh hai doan thang MN va OA.
Giai nhanh ho minh nhe!Cam on cac ban rat nhieu!
Cho doan thang AB =5cm ,goi I la trung diem cua AB .Tren tia BA ,lay diem M sao cho BM =7cm,tren tia AB lay diem N sao cho AN=7cm .I co phai la trung diem cua MN khong ?Tai sao?
Giup minh voi minh dang can gap
tren doan thang AB =5cm,lay diem M . Tren tia doi cua AB lay diem N sao cho AM=AN . tinh do dai doan thang BN khi BM=2cm
giai nhanh giup minh nhe
cho duong thang d va ba diem M,N,P bat ki.
a)neu duong thang d khong cat hai doan thang MN ma ko cat doan MP thi d co cat doan NP k?tai sao?
b)neu duong thang dcat doan thang MN ma ko cat doan thang MP thi d co cat doan thang NP ko?tai sao?
giup minh di,minh dang rat can
tren tia ox lay hai diem m,n sao cho om=2cm,on=8cm
a,tinh do dai doan thang mn
b,tren tia doi cua tia nm,lay mot diem p sao cho np=6cm.chung to diem n la trung diem cua doan thang mp