Các câu hỏi tương tự
cho goc bet xOy.Tren tia Ox lay diem A sao cho OA = 3 cm, Tren tia OY lay B sao cho OB = 3cm
a, Goi O la trung diem cua doan thang AB dung hay sai ? Vi sao ?
b,Goi i la 1 diem nam ngoai duong thang XY,ve cac ti IA,IB,IO. Gia su AIO = 40 do , AIB = 90 do . Tinh OIB
c, ke ten cac cap goc ke bu trong hinh ve
cac ban oi help me........plyyyyy
nam mo adi da phat
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
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
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
giup mink voi ai nhanh mink tick nee
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!!!!!
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 doan thang AB.Diem C thuoc tia doi cua tia BA.M la trung diem cua doan thang AB
a ) Chung to rang : CM =\(\frac{CA+CB}{2}\)
b ) Goi O la mot diem nam ngoai doan thang AB.Biet goc AOC = 120 do; goc BOC = 30 do;goc AOM = 60 do.Hoi OB co phai la tia phan giac goc MOC khong? Vi sao ?
cho tam giac ABC co BC=4cm. tren tia doi cua tia BC lay diem D sao cho BD=2cm/ a, tinh do dai CD; b,goi M la chung diem cua CD.tinh do dai BM;c,biet goc DAC bang 112 do .Ãxtia phan giac cua goc BAC va goc BAD. tinh so do goc xAy;d, tren nua mat phang bo la duong thang AC co chua diem D neu ve them n tia goc A phan biet khong trung voi cac tia ÂC,Ã,AB,Ay,AD thi co tat ca bao nhieu goc dinh A va Ay thu tu la
cho 2 diem A,, B thuoc 2 nua mat phang doi nhau bo la duong thang xy(A,Bko thuoc xy) Duong thang A, B cat xy tai M.
a,cho biet goc amy= 150 do. Hay tinh so do cac goc, gocamxva gocbmy.
b,tren tia mx lay mot diem o. Gia su gocaob=60do; goc aoy= 40 do.Tinh so do goc box