-Các cặp góc kề bù là:
góc MAQ và góc QAN
góc MAP và góc PAN
-Ta có: góc MAP + góc PAQ + góc QAN = góc MAN = 1800 (góc MAN là góc bẹt)
hay 330 + góc PAQ + 580 = 1800
=> góc PAQ = 1800 - 330 - 580
=> góc PAQ = 890
Vậy góc PAQ hay góc QAP = 890
Bai 5 : Cho hai duong thang xy va ab cat nhau tai O , sao cho xOa = 50o
a ) viet ten cac cap goc ke bu co trong hinh ve
b ) Tinh cac goc aOy , yOb , xOb
- Vẽ hình hộ mình với
Bai 1: Cho \(\widehat{xoy}\)=120. Ve tia phan giac Ot. Tinh \(\widehat{toy}\).
Bai 2: Ve 4 tia chung goc Ax, Ay, Az, At sao cho Ax va Ay doi nhau, 2 tia Az va At nam tren nua mat phang doi nhau co bo chung xy.
a, Tia At nam giua 2 tia nao?
b, Ke ten cac goc ke bu co tren hinh,
ve 2 goc ke bu xOy, yOx'. Biet goc xOy = 100 do. Goi Ot la tia phan giac cua goc xOy, Ot' la tia phan giac cua goc x'Oy. Tinh goc x'Ot, goc xOt', goc tOt'
1) cho goc bet xoy ve tia oz sao cho goc xoz=70*
a) tinh goc zoy
b) tren nua mat phang bo ox chua oz ve tia ot sao cho xot=140* chung to tia oz la tia phan giac cua goc xot
2) cho 2 goc ke bu goc xoy , yoz biet goc xoy=140*
a)tinh so do goc yoz
b) ve tia phan giac ot cua goc xoy tinh so do goc xot ,zot
3) cho hai goc ke bu xoy, yoz biet goc xoy=40*
a) tính so do goc yoz
b) ve tia ot la tia phan giac cua goc yoz tinh ó do goc yot goc xot
4) cho goc bet xoy ve tia oz sao cho goc yoz= 60*
a) tinh so do goc zox
b) ve tia om,on lan luot la tia phan giac cua goc xoz,yoz hai goc zom, zon co quan he gi giai thich
1) cho 2 goc ke bu xoy va yoz biet xoy= 60 *
a) tinh so do goc yoz
b) goi oa la tia phan giac cua goc yoz, ob la tia phan giac cua goc aoz . goc box la goc gi ?
giai thich vi sao?
2) cho goc xoy = 120 * ve oz la tia doi cua tia ox ve tia ot tren cung mot nua mat phang bo chua tia ox sao cho goc zot = 130 *
a) tinh so do goc yoz
b) chung minh tia oy nam giua hai tia oz,ot
c) tính số đo góc xot
3) cho 2 goc ke bu xoy , yoz biet goc xoy= 140*
a) tinh so do goc yoz
b) ve tia phan giac ot cua goc xoy tinh so do goc xot, zot
4) cho goc bet xoy . ve tia oz sao cho goc xoz = 70*
a) tinh goc zoy
b) tren nua mat phang bo ox chua oz ve tia ot sao cho xot = 140*. chung to tia oz la tia phan giac cua goc xot
cac ban lam nhanh cho minh nhe cam on
goc ke phu la goc nhu the nao
1) cho goc bet xOy ve tia Oz sao cho goc yOz= 60*
a) tinh so do goc zOx
b) ve tia Om On lan luot la tia phan giac cua goc xOz , yOz hai goc zOm va zOn co quan he gi , giai thich vi sao ?
2) cho 2 goc ke bu xOy , yOz biet xOy =60*
a) tinh so do goc yOz
b) goi Oa la tia phan giac cua goc yOz , Ob la tia phn giac cua goc aOz goc bOx la goc gi , giai thich vi sao ?
3) cho goc xOy = 120* ve Oz la tia doi cua tia Ox ve tia Ot tren cung nua mat phang bo chua tia Ox sao cho goc zOt = 130*
a) tinh so do goc yoz
b) chung minh tia Oy nam giua hai tia Oz, Ot?
c) tinh so do goc xot
giup minh voi
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
1. Cho hai goc ke \(\widehat{AOB}\) va \(\widehat{BOC}\) co tong so do cua hai goc la \(^{140^0}\) biet \(\widehat{AOB}\) co so do lon hon so do cua goc \(\widehat{BOC}\) la \(^{20^0}\)
a, Tinh \(\widehat{AOB,}\widehat{BOC}\)
b, Ve tia phan giac Om cua \(\widehat{AOB}\), tia phan giac On cua \(\widehat{BOC}\). Tinh \(\widehat{mOn}\).
