(40 - 1) . 40 : 2 = 780 góc
780 góc
(40 - 1) . 40 : 2 = 780 góc
780 góc
trên nửa mặt phẳng bờ chứa tia Ox ve 11 tia chung goc O . Hoi co bao nhieu goc tao thanh trong 11 tia do .Vi sao
ve n tia chung goc (n lon hon hoac bang 2),trong do khongco hai tia nao trung nhau
a,neu n=5 thi co bao nhieu goc tao thanh?
b,neu co 105 goc tao thanh thi nla bao nhieu?
lay 215 duong duong thang hang di qua O; khong trung voi 3 tia OA; OB; OC. hoi trong hinh ve co bao nhieu goc duoc tao thanh?
co bao nhieu goc tao tu 501 tia chung goc?giai thich?
co 10 duong thang dong quy tai o .co bao nhieu goc o dinh o duoc tao thanh
tren nua mat phang bo chua tia Ox ve 2 tia Oy vaOz sao cho goc xOy= 30 do, xOz= 60 do
a, chung minh tia Oy la tia phan giac cua goc xOz.
b, Goi Ot la tia doi cua Oy. Tinh tOx.
c, Ve them 3 tia OA,OB,OC ko dung voi cac tia tren. Hoi co bao nhieu goc tao thanh tren hinh ve
MN GIUP MIK VOI
co n tia chung goc va tao thanh 78 goc? xac dinh n
ho ba tia OA OB OC tao thanh ba goc bng nhau va khong co diem trong chung la AOB BOC va COA. vi sao co the khanh dinh tia doi cua moi tia noi tren la tia phan giac cua goc tao boi hai tia con lai
ve 20 tia chung goc
va cho biet co bao nhieu goc