Cho hình nón có bán kính đáy là 4a , chiều cao là 3a . Diện tích xung quanh hình nón bằng :           

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Don’t forget to ____________ in touch while you’re away.

• Find a mistake in the four underlined parts of the sentence and correct it:

  We study hard in high school in order to entrance a good university.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The Europeans and Asians are completely different with each other.

• Find a mistake in the four underlined parts of the sentence and correct it:

  I spent most of my time in the train read my favorite book.

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

  design                  sign                   singular                    mausoleum

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

  stadium                 take                 way                     bank

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

  meter                basket                   enough                   met

• Choose the word whose stress is on the first syllable:

  contain                  consult                      connect                       cancel

• Choose the word whose stress is on the first syllable:

  establish                  enterprise                    encourage                      equipment 

• Choose the word whose stress is on the first syllable:

  escape                  admire                   engage                      career