Cho ABCD.A’B’C’D' là hình lập phương có cạnh a. Thể tích của tứ diện ACD’B' bằng bao nhiêu?

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  His prarents prevented him _____________ staying up too late.
   

• Choose the best answer for the following sentence:

  A maximum ____________ for each activity is 20 points.
   

• Choose the best answer for the following sentence:

  To win the contest, you must complete five activities ___________.
   

• Choose the best answer for the following sentence:

  This price reduction is due to ____________ among suppliers.
  

• Choose one sentence that has the same meaning as the root one:

  I'm sorry I forgot your birthday, ” said Dave to Julia.
  
  

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

  glean                  creature                     clear                      queen

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

  classis                   cranky                  gradual                   quality

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

  struggle                     clumsy                    crucial                  grumble

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

  crouch                 group                    ground                  cloudy

• Choose a word that has different stress pattern:

  figure                  limit                    frozen                    increase