## Who was Pythagoras?

Pythagoras lived in the 500s BC. He was one of the first Greek mathematical thinkers that we know about, after Thales.

### Who was Thales?

All about Greek mathematics

Lots of articles about ancient Greece

Pythagoras spent most of his life in the Greek colonies in Sicily and southern Italy. He had a group of followers. They were his disciples, just as Taoists followed Lao Tzu, or Buddhists followed the Buddha.

### Where did Taoism come from?

When did Buddhism get started?

Pythagoras’s followers learned from him and taught other people what he had taught them. Like Lao Tzu and the Buddha, Pythagoras was probably rich enough not to have to worry about money. He had plenty of money, thanks to the unpaid work of enslaved people and colonized people around him.

### Slavery in ancient Greece

Greek colonization of Italy

## Pythagoreans were vegetarians

The Pythagoreans were known for their pure lives. They didn’t eat beans, for example. They thought beans were not pure enough. Like Buddhists and Zoroastrians at the same time, Pythagoreans questioned whether it was ever right to kill animals, even for religious sacrifices.

### What is animal sacrifice?

Who were the Zoroastrians?

Some Pythagoreans said it wasn’t right to eat meat. They were vegetarians or vegans. But all Pythagoreans wore their hair long. They wore only simple clothing, and went barefoot. Both men and women were Pythagoreans.

### Women in ancient Greece

## Music, math and philosophy

Pythagoreans were interested in philosophy. And they were especially interested in music and mathematics. They saw music and math as two ways to create order out of chaos. Music is noise that makes sense. Mathematics is rules for how the world works.

### Music in ancient Greece

Greek mathematics and astronomy

Order and chaos

## The Pythagorean Theorem

We remember Pythagoras best for proving that the Pythagorean Theorem was true. The Sumerians and Egyptians, two thousand years earlier, already knew that the Pythagorean Theorem was generally true.

### What is the Pythagorean Theorem?

Math in ancient Egypt

Sumerian math and numbers

Architects used it in their measurements. But Pythagoras may be the first mathematician who proved that the Pythagorean Theorem would always be true. We don’t really know whether it was Pythagoras that proved it. There’s no evidence for this proof until the time of Euclid, several hundred years later.

### Who was Euclid?

Some people think that the proof must have been written around the time of Euclid, instead. But that’s the tradition.

## Proving the Pythagorean Theorem

More about Greek mathematics

More about Greek philosophy

## Bibliography and further reading about Pythagoras:

What’s Your Angle, Pythagoras? A Math Adventure, by Julie Ellis and Phyllis Hornung (2004). For teens.

Pythagoras and the Pythagoreans: A Brief History, by Charles Kahn (2001).

History of Greek Mathematics: From Aristarchus to Diophantus, by Thomas L. Heath (1921, reprinted 1981). A lot of Euclid, but also describes who the other major Greek mathematicians were and what they did.

Episodes from the Early History of Mathematics, by Asger Aaboe (1997).

joeywhipeMay 29, 2019 at 7:54 amhi im joey and i like dogs and cats

JoséMay 28, 2019 at 7:42 amThanks for the giggles, Karen! Your comment makes my day so flattering :) coming from Italy!

Yodc SevaelMay 16, 2019 at 11:43 amThanks a lot!

Jake (From State-Farm)October 1, 2018 at 7:19 amThanks for the Info

natalya kientopMarch 28, 2018 at 10:31 ami couldnt really find the answers

Karen CarrMarch 28, 2018 at 2:14 pmSorry, Natalya! What were the questions you were trying to answer?

natalya kientopMarch 27, 2018 at 10:33 ami have a question what was his influence on Greek culture?

what was his influence on mathematics?

where do we see his math influence in real life?

Karen CarrMarch 27, 2018 at 11:21 amThat sounds like your homework? I think you will find the answers in the article.

DaveFebruary 2, 2018 at 11:24 amFact:Pythagoras was a nerd

Opinion: Eh he’s okay I guess

Karen CarrFebruary 2, 2018 at 10:24 pmThanks for the giggle, Dave! That seems about right.