Theaetetus

Theaetetus of Athens, possibly the son of Euphronius of the Athenian deme Sunium, was a Greek mathematician. His principal contributions were on irrational lengths, which was included in Book X of Euclid's Elements and proving that there are precisely five regular convex polyhedra.

Summary from Wikipedia (CC BY-SA 4.0) · Dates from Wikidata (CC0)

Who was born first?

• Theaetetus was born 10 years before Speusippus
• Theaetetus was born 21 years before Xenocrates
• Theaetetus was born 26 years after Hippias
• Theaetetus was born 32 years before Heraclides Ponticus
• Theaetetus was born 37 years before Menaechmus

Timeline

1. Hippias443–399 BC
2. Theaetetus (this page)circa 417 BC – circa 369 BC
3. Speusippus407–339 BC
4. Xenocrates396–314 BC
5. Heraclides Ponticus385 BC – circa 322 BC
6. Menaechmuscirca 380 BC – circa 320 BC

Related

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• Johann Wolfgang von GoetheAugust 28, 1749 – March 22, 1832
• Immanuel KantApril 22, 1724 – February 12, 1804
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• Marie CurieNovember 7, 1867 – July 4, 1934
• Nicolaus CopernicusFebruary 19, 1473 – May 24, 1543
• Louis PasteurDecember 27, 1822 – September 28, 1895
• Gottfried Wilhelm LeibnizJune 21, 1646 – November 14, 1716