## Archive for June 20th, 2012

### Plato’s approximation of pi?

Posted by: **Dave Richeson** on June 20, 2012

A blog about math, puzzles, teaching, and academic technology

Euler's Gem: The polyhedron formula and the birth of topology

Princeton University Press

2008

Euler's Gem Facebook page

Buy it:

Princeton University Press

Amazon

Princeton University Press

2008

Euler's Gem Facebook page

Buy it:

Princeton University Press

Amazon

- RT @beesandbombs: ðŸš€ https://t.co/MGurKfGjzb 2 hours ago
- I really don't want to blow it: I've got to think up something clever and funny for my 10,000th tweet. Hmmm... https://t.co/3ep2v2hh4z 5 hours ago
- Aristotle on âˆš2 irrational: "diagonal is incommensurable because if it is put as commensurable, then odd numbers become equal to even ones." 6 hours ago
- Good metaphor that could apply in many situations... twitter.com/miclugo/statusâ€¦ 9 hours ago
- Q. How many mathematicians does it take to change a lightbulb? A. 0.999... 1 day ago

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