Bài tập 2 trang 168 SBT Hình học Toán 12

A. \(16\pi {a^2}.\)                 B. \(2\pi {a^2}.\)               C. \(8\pi {a^2}.\)              D. \(4\pi {a^2}.\)

A. \(V = 10.\)               B. \(V = 5.\)                 C. \(V = 30.\)               D. \(V = 15.\)

A. \(V = \dfrac{{{a^3}\sqrt 3 }}{{12}}.\)

B. \(V = \dfrac{{{a^3}\sqrt 3 }}{8}.\)

C. \(V = \dfrac{{{a^3}}}{8}.\)

D. \(V = \dfrac{{{a^3}\sqrt 3 }}{{24}}.\)

A.\(V = 12\pi .\)                  

B.\(V = \dfrac{{16\pi \sqrt 3 }}{3}.\)                               

C.\(V = 16\sqrt 3 \pi .\)     

D. \(V = 4\pi .\)

A. \({S_{xq}} = 2\pi {a^2}.\)                 

B. \({S_{xq}} = \pi {a^2}.\)       

C. \({S_{xq}} = \pi \sqrt 2 {a^2}.\)                                             

D. \({S_{xq}} = \sqrt 2 {\pi ^2}a.\)

A.\(V = \dfrac{{{a^3}\sqrt 2 }}{6}.\)                                     

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

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

D. \(V = {a^3}\sqrt 2 .\)

A. \(\dfrac{{a\sqrt 6 }}{2}.\)                                         

B. \(\dfrac{{a\sqrt 3 }}{2}.\)           

C. \(\dfrac{{a\sqrt 6 }}{4}.\)      

D. \(\dfrac{{a\sqrt 2 }}{2}.\)

    A. \(\left( {2 + 2\sqrt 2 } \right)\pi {a^2}.\)

    B. \(\left( {4 + \sqrt 2 } \right)\pi {a^2}.\)

    C. \(\left( {2 + \sqrt 2 } \right)\pi {a^2}.\)

    D. \(\left( {1 + \sqrt 2 } \right)\pi {a^2}.\)

A. \({30^0}.\)                        B. \({60^0}.\)

C. \({90^0}.\)                        D. \({120^0}.\)

A. \(\dfrac{{{a^2}h\sqrt 3 }}{3}.\)                B. \(\dfrac{{{a^2}h\sqrt 3 }}{6}.\)

C. \(\dfrac{{{a^2}h\sqrt 3 }}{{12}}.\)           D. \(\dfrac{{{a^2}h\sqrt 3 }}{4}.\)

A. \(\dfrac{{4\pi {a^3}}}{3}.\)                           B. \(\dfrac{{\pi {a^3}}}{3}.\)

C. \(\dfrac{{\pi {a^3}}}{2}.\)                     D. \(\dfrac{{\pi {a^3}}}{6}.\)

A. \(2250\pi \left( {c{m^3}} \right).\)           B. \(750\pi \left( {c{m^3}} \right).\)

C. \(2250\left( {c{m^3}} \right).\)           D. \(750\left( {c{m^3}} \right).\)