Cho hình chóp S.ABC có đáy là  vuông cân ở B, và . Gọi G là trọng tâm của , một mặt phẳng đi qua AG và song song vsơi BC cắt SC, SB lần lượt tại M, N. Thể tích khối chóp S.AMN bằng.

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Một số câu hỏi khác có thể bạn quan tâm.

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

  The small pool designed for use by young children is going to be reopened.
  
  

• Choose the best answer for the following sentence:

  Jim is a kind of person ____________ whom one can talk about anything.
    

• Choose the best answer for the following sentence:

  When I was a boy, I often went to school _______________ foot.
   

• Choose the best answer for the following sentence:

  I wasn't a serious accident. Only the car was badly ____________.
   

• Choose the best answer for the following sentence:

  When I returned home after 20 years, everything ____________completely.
  
  

• Choose the best answer for the following sentence:

  _____________ do teenagers in your country give their friends on their birthday?
   

• Choose the best answer for the following sentence:

  Do your parents celebrate _____________ wedding anniversary each year?
   

• Choose the best answer for the following sentence:

  How _________ have your parents been married?
   

• Choose the correct sentence which is built from the words and phrases given:

  By contrast / the share / oil in total energy consumption / decrease / 95 percent / 80 percent / the same period
  
  

• Choose the best answer for the following sentence:

  What do people ___________ the 25^th wedding anniversary? Is it "silver anniversary"?