Các câu hỏi tương tự
1,Cho goc xoy co so do bang 120 do .Tren canh ox va oy lay cac diem a va b ,tren doan ab lay hai diem c va d nam giua a va b sao cho goc aoc bang 30 do goc bod bang 35 do .tinh cob ,cod.
cho goc xoy .tren tia ax lay diem d sao cho ab =5 cm tren tia doi cua tia ac lay diem d sao choad=3cm c la 1 diem thuoc tia ay /a/ tinh BD/b/ biet goc bcd=85 độ;bca=5o do tinh acd /c/tia ak=1cm(k thuoc bd tinh bk
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
cho goc aob = 60 do ve tia oc la phan giac cua goc abo
a, tinh so do cac goc aoc, boc b ve tia od thuoc nua mat phang khong chua diem
b, co bo chua tia oa sao cho goc aod = 150 do chung to rang 3 diem c,o,d thang hang
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 doan thang ab diem c thuoc tia doi cua tia ba goi o la 1 diem nam ngoai ab biet goc aoc=120 do boc=30 aom=60 hoi ob co phai phan giac cua moc ko 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 tam giac ABC co goc BAC =90 do lay diem M thuoc cach BC sao cho goc MAC =20 do
a, tinh goc MAB
b, Trong goc MAB ve tia Ax cat BC tai N sao cho goc NAB = 50 do .Chung to AM la tia phan giac cua goc NAC
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