Cho hình chóp S.ABCD có đáy ABCD là hình chữ nhật . Mặt bên SAB là tam giác đều và nằm trong mặt phẳng vuông góc với đáy. Biết AC vuông góc với SD. TÍnh thể tích V của khối chóp S.ABC.                                     

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Một số câu hỏi khác có thể bạn quan tâm.

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

  jumps              tenants            roofs             kids

• Choose a word that has different stress pattern:

  campground             discard              athlete             capture

• Choose the best answer for the following sentence:

  The girl _____________ with Dr. Zhang is my classmate.
   

• Choose the best answer for the following sentence:

  If you _______________ to me, you would have a lot of money by now.
   

• Choose the best answer for the following sentence:

  The Great Wall of China _______________ for about 6,000 km from east to west.
   

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

  Tom doesn't like playing the guitar. Dane doesn ’t like playing the guitar.
   

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

  I didn ’t expect them to invite me to the reception.
  

• Choose a word that has different stress pattern:

  treasure            conquest             indulge                bricklaying

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

  splutter                dusk              lunch             huge

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

  leaves              pitches           ranges              places