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 cu...
Đọc tiếp
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