tren duong thang xy lay diem o ，tren cung 1 nua mat phang bo xy ve 2 tia oz va ot sao cho goc xoz=goc yot=130 do. tinh goc xot ，goc yoz，goc xot
Cho diem O nam tren duong thang xy. Tren cung 1 nua mq bo la duong thang xy.Ve 2 tia Oz, Ot sao cho goc yOz = 64 do, goc xOt = 58 do
a) Tinh so do cua goc xOz va zOt ?
b) Chung to rang Ot la tia phan giac cua goc xOz
c) ve tia phan giac Om cua goc yOz .Hoi goc mOt la goc nhon, goc vuong hay goc tu .Vi sao ? Tu do rut ra nhan xet gi ?
cho goc xOy=120 do.trong goc xOy ve tia Oz sao cho goc xOz>2. goc zOy. ve tia phan giac Ot cua goc xOz va tia phan giac Om cua goc tOy.
a)Hoi trong 3 tia Ot, Om, Oz tia nao nam giua?
b) cho goc zOy=30 do tinh goc mOz
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
lay diem O batcky tren xy. tren nua mat phang bo xy, ve tia Ozcsao cho goc xoz = 50 do. tren tia Oy, lay diem B. tren nua mat phang bo xy chua tia Oz , ve Bt sao cho goc tBy= 130 do :
a) chung minh Oz song song Ot
b) ve tia Om va Bn lan luot la tia phan giac cua goc xoz va goc xbt. chung minh Om song song Bn
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
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
tren nua mat phang bo chua tia ox ,ve hai tia oy,oz sao cho goc xoy bang 110 do ,xoz bang 20 do
a)tinh so do goc yoz ?
b) ve tia phan giac om cua goc yoz va tia on la tia doi cua tia ox .Tinh so do goc mon ?
c)ke ten cac cap goc ke bu
Tren cung nua mat phang co bo la duong thang xy di qua diem O. Ve tia Ot , Oz sao cho xot =62° , yoz = 28 °.
a) Tinh toz
b) Viet ten cac goc nhon, goc vuong, goc tu
c) Viet ten cac cap goc phu nhau
d) Viet ten cac cap goc ke bu, bu nhau
Cac viet day du giup mk nhe
Giup mk voi mk dang can sieu gap
