Bài tập 6 trang 169 SBT Hình học Toán 12

A. \(2{a^3}.\)                      B. \(2\sqrt 2 {a^3}.\)

C. \(3{a^3}.\)                      D. \(3\sqrt 2 {a^3}.\)

A. \(12\pi {a^2}.\)             

B. \(6\pi {a^2}.\)

C. \(36\pi {a^2}.\)             

D. \(9\pi {a^2}.\)

A. \(3a.\)                               

B. \(6a.\)

C. \(9a.\)                               

D. \(27a.\)

A. \(\left\{ {4;3} \right\}\) và \(\left\{ {3;3} \right\}.\)

B. \(\left\{ {4;3} \right\}\) và \(\left\{ {3;5} \right\}.\)

C. \(\left\{ {4;3} \right\}\) và \(\left\{ {3;4} \right\}.\)

D. \(\left\{ {3;4} \right\}\) và \(\left\{ {4;3} \right\}.\)

A. 6                                        

B. 12                                       

C. 4                                        

D. 8

A. \(S = \dfrac{{{a^2}\sqrt 3 }}{4}\)                                   

B. \(S = \dfrac{{{a^2}}}{2}\) 

C. \(S = \dfrac{{{a^2}\sqrt 3 }}{2}\) 

D. \(S = \dfrac{{{a^2}}}{4}\)

A. \(V = \dfrac{{2{a^3}\sqrt 3}}{3}\)                                

B. \(V = \dfrac{{{a^3}\sqrt 3 }}{3}\)

C. \(V = {a^3}\sqrt 3 \)         

D. \(V = 2{a^3}\sqrt 3 \)

A. \(S = {a^2}\)                      

B. \(S = 2{a^2}\)                   

C. \(S = \dfrac{{{a^2}\sqrt 3 }}{4}\) 

D. \(S = {a^2}\sqrt 3 \)

A. 0                                        

B. 1                                         

C. 2                                        

D. 4

A. 8                                        

B. 4                                         

C. 12                                      

D. 6

A. \(V = \dfrac{{125\pi {a^3}}}{{27}}\)                              

B. \(V = \dfrac{{25\sqrt 3 \pi {a^3}}}{3}\)

 C. \(V = \dfrac{{25\sqrt 2 \pi {a^3}}}{3}\) 

D. \(V = \dfrac{{125\sqrt 3 \pi {a^3}}}{{54}}\)

A. \(r = \sqrt 2 a\)      

B. \(r = 2\sqrt 3 a\)    

C. \(r = \sqrt 3 a\)      

D. \(r = 2\sqrt 2 a\)