Cho khối lăng trụ tam giác $ABC.A^{\prime }{B}^{\prime }{C}^{\prime }$ . Gọi $M,N$ lần lượt thuộc các cạnh bên $A{A}^{\prime },C{C}^{\prime }$ sao cho $MA=M{A}^{\prime };NC=4N{C}^{\prime }$ . Gọi $G$ là trọng tâm tam giác $ABC$ . Hỏi trong bốn khối tứ diện $G{A}^{\prime }{B}^{\prime }{C}^{\prime },B{B}^{\prime }MN,AB{B}^{\prime }{C}^{\prime }$ và $A^{\prime }BCN$ , khối tứ diện nào có thể tích nhỏ nhất? $$

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  If you are looking for volunteers, count me _________.
   

• Choose the best answer for the following sentence:

  He wrote __________ his sister when she got into trouble.
   

• Choose the word that has the underlined part pronounced differently from the rest:

  advocate                pioneer                  involvement                  philosopher

• Choose the word that has the underlined part pronounced differently from the rest:

  rubbish                  struggle                   tsunami                sculpture

• Choose the word that has the underlined part pronounced differently from the rest:

  civilization                              intellectual                                epidemic                                     discriminate

• Choose the word that has the underlined part pronounced differently from the rest:

  childbearing                    deep-seated                   childrearing                  clear

• Choose the word that has the underlined part pronounced differently from the rest:

  neglect                          hesitation                            incredible                             expedition

• Choose a word that has different stress pattern:

  enlightenment                          recognition                             comparison                          education

• Choose a word that has different stress pattern:

  nonsense                          temper                              contact                              deny

• Choose a word that has different stress pattern:

  opportunity                            civilization                           discrimination                            consideration