Liu Hui

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29 07, 2017

What is pi? Simple geometry – Math, circles, circumference, diameter

By |2018-04-23T16:01:03-07:00July 29th, 2017|Math|8 Comments

What is pi? The geometry of a circle What is pi? Pi is a number that is just a little bigger than 3.14. It is the number you get if you divide the circumference of any circle by its diameter. It's the same for all circles. You can approximate pi for yourself by taking some circular things like the tops [...]

7 06, 2017

Math and Numbers in Ancient China

By |2018-04-25T12:09:29-07:00June 7th, 2017|China, Science|0 Comments

Chinese numbers: number rods Chinese numbers People in China were using written numbers by about 1500 BC, in the Shang Dynasty. This is about two thousand years later than people began to write numbers in West Asia. It's more than a thousand years later than people began to write numbers in India. Nobody knows whether [...]