a) vì \(\widehat{xOy}\) và \(\widehat{yOz}\)kề nhau nên \(\widehat{xOz}=\widehat{xOy}+\widehat{yOz}\)= 120 + 75 = 195
mà 195 > 180 nên \(\widehat{xOz}=360^o-195^o=165^o\)
b) Vì \(\widehat{Ox'}\)là tia đối của tia \(\widehat{Ox}\) nên \(\widehat{xOx'}=180^o\)
\(\widehat{yOx'}=\widehat{xOx'}-\widehat{xOy}=180^o-75^o=105^o\)
\(\widehat{zOx'}=\widehat{yOz}-\widehat{yOx'}=120^o-105^o=15^o\)
cho goc xoy va goc yoz la 2 goc ke nhau.Biet goc xoy=30do, goc yoz=75do .Goi ot la tia doi cua tia ox
tinh so do goc zot
oz co phai la tia phan giac cua goc yot k Vi sao
cho goc xoy va yoz la hai goc bu nhau, oz nam giua ox va oy, goc yoz=50 độ. 2 ke tia phan giac xom cua goc xy. tinh goc moz
1. tinh goc xoy?
2. ke tia phan giac xom cua goc xy. tinh goc moz?
cho 2 goc ke nhau xOy = 750 va yOz = 1200
a, tinh xoz
b,goc Ox' la yia doi cua ox.tinh yox' va zox'
ai nhanh mik tik cho
tren 1 nua mp bo chua tia ox, ve 2 tia oy va oz sao cho goc xoy =100do ,xoz= 40do .a, tinh xoz.b, ve tia ot la tia pg cua yoz,tinh xot.c,goi ox`la tia doi cua tia ox,tinh x`oz
TREN CUNG MOT NUA MAT PHANG CO BO CHUA TIA Ox VE HAI GOC xOy,yOz KE BU NHAU SAO CHO GOC xOy=80 DO
A] TINH GOC yOz
B] GOI Om , On LA CAC TIA PHAN GIAC CUA GOC xOy VA GOC yOz . CHUNG TO GOC mOm LA GOC VUONG
C] TREN NUA MAT PHANG KO CHUA TIA Oy CO BO CHUA TIA Ox , VE TIA Oc SAO CHO GOC xOt=80 DO . TINH mOt
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
cho goc xOy=150 do, tia Ox' la tia doi cua tia Ox; tia Oy' la tia doi cua tia Oy. tinh goc xOy, va goc x'Oy'
ve hai goc ke bu xOy va yOx'. biet xOy=110,goi Ot la tia phan giac cua goc xOy. tinh goc x'Ot
cho tia Ox nam giua hai tia Oy va Oz.Biet xOy=35 do,xOz=70 do
a Tinh goc yOz
b Ve tia OM la tia doi cua tia Ox .Tinh goc mOz?
