1) Cho tam giac ABC vuong tai A. Ke AH vuong goc voi BC ( H ∈ BC ) thi co bao nhieu cap tam giac dong dang

A. 4 cap      B. 3 cap     C. 2 cap           D. 1 cap

1) Hai tam giac ABC va tam giac DEF co goc B = goc E va de tam giac ABC ∼ tam giac DEF thi can them dieu kien nao sau day 

A. goc A = goc D         B. goc A = goc E      C. goc C = goc E        D. goc B = goc E

1) Cho tam giac ABC co CD la tia phan giac goc BCA va C thuoc canh AB. Thi khang dinh nao sau day la dung

A. \(\dfrac{CA}{DB}=\dfrac{DA}{CB}\)        B. \(\dfrac{CB}{CA}=\dfrac{DA}{DB}\)  C. \(\dfrac{CA}{CB}=\dfrac{DB}{DA}\)      D. \(\dfrac{CA}{CB}=\dfrac{DA}{DB}\)

1) Chon tu sai va sua loi

a) Barbara, who knowing mainly as a novel writer, has now written a successful biography

b) The fruit to import from America was expensive

1) Chon tu sai va sua loi

a) They are taking about the book which written by Shakespeare

b) The book publishing last week is her first novel about a World Heritage Site in Viet Nam

c) Do you know the man talked to our friend, Nam over there?

1) Chuyen n ve 1 ve: 

\(n=\dfrac{1}{\sqrt{3}.\sqrt{1-\dfrac{1}{n^2}}-\dfrac{1}{n}}\)→ n = 

1) Tai sao lai chuyen duoc: 

sinA = n sin \(\dfrac{A}{2}\)→ 2sin \(\dfrac{A}{2}\). cos \(\dfrac{A}{2}\) = n sin\(\dfrac{A}{2}\)

1) Phan tich cac buoc xam luoc Viet Nam cua Phap

1) Neu khai niem ve thu tuc (Procedure) va ham(Funection)

1) Viet cac cau lenh de doc du lieu tu tep ''dulieu.txt'' 2 bien a,b ( su dung bien tep f1)