Trong mặt phẳng tọa độ , cho đường tròn  và điểm . Dây cung của  đi qua  có độ dài ngắn nhất là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose a word that has different stress pattern:

  general                  however                 family                motorbike

• Choose the best answer for the following sentence:

  As teenagers, we always _____ each other very well. We still understand each other now.

• Choose the best answer for the following sentence:

  I’m afraid I must ask you both what you _______ yesterday at 10.20 p.m.

• Choose the best answer for the following sentence:

  I ______ him for five years. I wonder where he is.

• Choose the best answer for the following sentence:

  My brother _______ his job last month and since then he _____ out of work.

• Choose the best answer for the following sentence:

  Just as I _____ what to do next, the phone _______.

• Choose the best answer for the following sentence:

  ________ she was watering the flowers, it began to rain.

• Choose the best answer for the following sentence:

  My parents are very kind and they are very ________ of me.

• Choose the best answer for the following sentence:

  Could you please give me a/an ________ with the cooking?

• Choose the best answer for the following sentence:

  The exam is coming, so I’m _______ a lot of study pressure.