bai 1 tren duong thang xx, lay mot diem O.Tren cung nua mat phang bo la duong thang xx, ve 3 tia oy,ot,oz sao cho xoy =40do,xot=97do,xoz=54do
a.,chung minh rang ot nam giua hai tia oy va ot
b, CMR tia OT la tia phan giac cua goc zoy
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tren duong thang xy' lay 1 diem O. Tren cung nua mf Bo la duong thang xx' ve 3 ta Oy,Ot,Oz sao cho :goc x'Oy=40độ ;xot=97độ;xOz=54độ a) cmr tia Ot nam giua 2 tia oy va Oz b)cmr tia Ot la tia phan giac cua goc zoy
tren duong thang x'x lay 1 diem O .tren cung 1 nua mat phang bo x'x ta ke 3 tia OY;Ot;Oz sao cho goc x'Oy la 42 do goc xOt ls 97 do va goc xOz la 56 do .a,chung to Ot nam giua 2 tia Oy,Oz .b,chung to Ot la tia phan giac cua goc zOy
tren duong thang x'x lay 1 diem O .tren cung 1 nua mat phang bo x'x ta ke 3 tia OY;Ot;Oz sao cho goc x'Oy la 42 do goc xOt ls 97 do va goc xOz la 56 do .a,chung to Ot nam giua 2 tia Oy,Oz .b,chung to Ot la tia phan giac cua goc zOy
tren duong thang xy lay 1 diem O. Ve 2 tia Oz va Ot tren cung nua mat phang bo xy sao cho goc xOt=a* va yOz=80 do (a*<100 do)
1. Chung to Oz nam giua 2 tia Oy va Ot
2. Tim gia trị của a để goc zOt=xOt + yoz /2
tren duong thang x'x lay diem O tuy y ve hai tia oz va oy nam tren cung mot nua mat phang co bo x'x sao cho xoz=40 do, xoy=3.xoz.
a) trong 3 tia ox,oy,oz,tia nao nam giua hai tia con lai
b) goi oz la tia phan giac xoy tinh goc zoz?
mong cac ban giai dung minh nhe minh dang gap sang mai minh phai nop bai roi
tren duong thang xx' lay diem O tuy y . Ve 2 tia Oz va Oy nam tren cung 1 nua mat phang bola xx' sao cho xOz= 40; x'Oy = 3 x xOy
tren duong thang xx' lay diem O . Tren cung 1 nua mat phang bo la tia xx'. Ve 3 tia Ot, Oy, Oz sao cho goc x'Oy =40 do, goc xOt=97 do, goc xOz = 54 do
Xem chi tiết
a, Chung to tia Ot nam giua hai tia Oy va Oz
b, Chung to tia Ot la tia phan giac cua goc yOz
Giai Day Du , Minh tick cho
Cho Ox va Oy la hai tia doi nhau.Tren cung mot nua mat phang bo la duong thang xy ve hai tia Oz va Ot sao cho goc xOz=150 do;goc yOt=60 do.
a)Tinh so do goc xOt.
b)Chung to Oz la tia phan giac cua goc yOt.
c)Tren nua mat phang co chua tia Oz bo la duong thang xy ve tia Om sao cho goc zOm=90 do.Hoi tia Om co la tia phan giac cua goc xOt hay khong?Vi sao?
Kham khảo này :
https://imgur.com/LTMZXHU
https://imgur.com/O7e7GYo
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