Zu Chongzhi 祖沖之

In which period did Zu Chongzhi live?

祖沖之生於哪個朝代?

• Qin dynasty

  秦朝

• Han dynasty

  漢朝

• Southern and Northern dynasties

  南北朝

• Ming dynasty

  明朝

What tools did Zu Chongzhi use to perform calculations?

祖沖之使用甚麼工具來進行運算?

• abacus

  算盤

• Slide rule

  算尺

• Arithmetic rope

  算繩

• counting rods

  算籌

What knowledge did Zu Chongzhi’s grandfather teach Zu Chongzhi?

祖沖之從祖父學習甚麼知識?

• astronomy

  天文

• gardening

  園藝

• literature

  文學

• military science

  軍事學

From an old book read by Zu Chongzhi, what is the circumference of a circle?

祖沖之從書本所知的圓周長度為何?

• 2 times the radius

  半徑的兩倍

• 3 times the diameter

  直徑的三倍

• 4 times the radius

  半徑的四倍

• 6 times the diameter

  直徑的六倍

How did Zu Chongzhi know that the value from the book was not accurate?

祖沖之如何得知書上的數字不準確?

• reading another book

  讀另一本書

• asking his grandfather

  向祖父發問

• measuring a wheel with a rope

  用繩量度車輪

• walking around a circular lake

  繞着圓形的湖走

• a 10-sided polygon

  十邊形

• a 400-sided polygon

  400邊形

• a 2048-sided polygon

  2048邊形

• a 3072-sided polygon

  3072邊形

• 1 significant figure

  至一位有效數字

• 3 significant figures

  至三位有效數字

• 5 decimal places

  至五個小數位

• 7 decimal places

  至七個小數位

Zu Chongzhi suggested to emperor that a new _______ should be used.

祖沖之向皇帝提議採用新的_______。

• textbook

  教科書

• calendar

  曆法

• palace

  皇宮

• horse cart

  馬車

By measuring the lengths of shadow at noon, Zu Chongzhi showed that the position of the ________ was different every winter solstice.

藉着量度正午時影子的長度，祖沖之證明冬至的______位置有所變動。

• Moon

  月亮

• Jupiter

  木星

• Sun

  太陽

• Mars

  火星

What is/are the inventions of Zu Chongzhi?

以下哪一個/哪些是祖沖之的發明?

• south-pointing chariot

  指南車

• thousand li ship

  千里船

• hammer mill

  水碓磨

• all of the above

  以上皆是