Cho hình chóp  có đáy  là hình thoi tâm , đường thẳng  vuông góc với mặt phẳng . Biết , . Tìm số đo của góc giữa hai mặt phẳng  và  

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  The pagoda was built ___________ the shape of a lotus.
  
  

• Choose the best answer for the following sentence:

  Tuan: “There’s a football match on VTV3 at 11 o’clock tonight, will you watch
  it?”

  Minh: “It’s Manchester United vs. Chelsea. Of course, I ________ it”
   

• Choose the best answer for the following sentence:

  We are enjoying our holiday. We _________ a nice room in the hotel.
   

• Choose the best answer for the following sentence:

  Be careful with ___________ computer games. You may not control yourself.

   

• Choose the best answer for the following sentence:

  Her aunt feeds her but who is in charge of paying her ___________?
   

• Choose the best answer for the following sentence:

  The function of ROM in computer is to provide information that is ___________ and permanent.
   

• Choose the best answer for the following sentence:

  Every two days my mother buys a ___________ of bananas for our desert.
   

• Choose the best answer for the following sentence:

  Nam: “Why do we use T.V _________?''

  Tuan: “To watch news, performances, football matches, and to learn foreign languages”
  
  

• Choose the best answer for the following sentence:

  
   An architect is a person __________ profession is planning or designing of buildings.
   

• Choose the best answer for the following sentence:

  Speaking test can be called as __________ test.