Các câu hỏi tương tự
Co 40 tia chung goc .hoi co bao nhieu goc duoc tao thanh
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?
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
ch 2000 tia chung goc O biet rang cu 2 tia chung goc thi tao thanh 1 goc . Hay tinh goc dinh O dc tao thanh tu 2000 tia chung goc O
ve 20 tia chung goc
va cho biet co bao nhieu goc
co n tia chung goc va tao thanh 78 goc? xac dinh n
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
cho tam giac ABC co BC=4cm. tren tia doi cua tia BC lay diem D sao cho BD=2cm/ a, tinh do dai CD; b,goi M la chung diem cua CD.tinh do dai BM;c,biet goc DAC bang 112 do .Ãxtia phan giac cua goc BAC va goc BAD. tinh so do goc xAy;d, tren nua mat phang bo la duong thang AC co chua diem D neu ve them n tia goc A phan biet khong trung voi cac tia ÂC,Ã,AB,Ay,AD thi co tat ca bao nhieu goc dinh A va Ay thu tu la
Ve hinh de thay moi cau sau la sai:
a) hai tia chung goc luon la hai tia doi nhau
b) hai tia chung goc luon la 2 tia trung nhau
c)hai tia chung goc luon la 2 tia phan biet
d)hai tia co nhieu diem chung chi khi chung la 2 tia trung nhau
e)hai tia phan biet va co goc chung luon la 2 tia doi nhau
f)hai tia khong chung goc luon lA 2 tia khonh co dIEM chung
ai giup minh minh cam on nhIeu nha!!!