# Euclid's puzzling parallel postulate

- Institution: TED
- Department: TED-Ed
- Speaker: Jeff Dekofsky
- Year: 2013
- Level: For everyone
- Language: English
- Subjects: Mathematics
- Source: [TED](https://www.ted.com/talks/jeff_dekofsky_euclid_s_puzzling_parallel_postulate)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Euclid, known as the "Father of Geometry," developed several of modern geometry's most enduring theorems--but what can we make of his mysterious fifth postulate, the parallel postulate? Jeff Dekofsky shows us how mathematical minds have put the postulate to the test and led to larger questions of how we understand mathematical principles. \[Directed by David Bernal, narrated by Jeff Dekofsky\].

## Lectures

1. [Euclid's puzzling parallel postulate](https://invisiblenetwork.ai/learn/ted/jeff_dekofsky_euclid_s_puzzling_parallel_postulate/4f2e0c1e7155), 4 min (TED's player)