Các câu hỏi tương tự
Cho goc bet xOy.Tren cung mot nua mat phang xy, ve tia Ot,Oz sao cho xOt=yOz=30'
a)Tinh so do goc tOz
b)Ve tia phan giac Om cua goc tOz.Tia Om co phai la tia phan giac cua goc xOy khong?Vi sao?
co 2 goc ke bu xoy va yoz goi om la tia phan giac cua xoy ve on vuong goc voi om chung to on la tia phan giac cua goc yoz
tren cung mot nua mat phang bo chua tia Ox ve cac tia Oy Oz,Ot sao cho xOy <xOz<xOt<180• va co xOz =yOt A,B,C,D khac 0 lan luot la cac diem tren tia Ox ,Oy ,Ot sao cho OA=Oc ,OB = OD
a,c/m goc AOB =goc COD
b,goi Om la tia phan giac cua goc AOD chung minh Om la tia phan giac cua goc BOC
help me
cho goc xoy ke bu voi goc yot tinh goc yot ve om la tia phan gia cua goc xoy tinh mot ve tia on la tia phan giac cua goc toy tinh goc mon
cho 3 tia Ox ; Oy ; Oz sao cho xoy = yoz=xoz goi om la tia doi cua ox
chung minh om la tia phan giac yoz
tinh cac goc xoy ; yoz; xoz
Cho goc xOy khac got bet co tia phan giac Ot. Lay diem A thuoc tia Ox, ve tia Am // Oy ( tia Am nam trong goc xOy )
a/ Chung minh goc xAm = goc xOy
b/ Ve tia phan giac An cua goc xAm. Cm: An // Ot
c/ Ve tia Ah vuong goc Ot tai H. Cm AH la tia phan giac cua goc OAm
Cho hai goc ke bu xOy va yOx'. Ve Oz, Ot lan luot la tia phan giac cua goc xOy va yOx'. Ve duong thang mm' vuong goc voi Oz tai K. Chung minh: Ot//mm'
Cho goc xoy la goc tu trong nua mat phang bo chua tia ox.Ke tia oz vuong goc voi ox goi oe la tia phan giac cua goc zoy, biet zoe =20 do tinh xoy
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tren duong thang xy lay diem o ve tia ot sao cho goc xot bang 30 . tren nua mat bo xy khong chua ot ve tia oz sao cho goc xoz = 120. ve tia ot' la tia phan giac cua goc yoz chung to rang goc xot va got yot' la hai goc doi dinh
ai lam nhanh minh tich cho