Posted by: **Alexandre Borovik** | March 22, 2010

## Flat Earth Geometry

A great openning of the new Strogatz’s post:

The most familiar ideas of geometry were inspired by an ancient vision — a vision of the world as flat. From parallel lines that never meet, to the Pythagorean theorem discussed in last week’s column, these are eternal truths about an imaginary place, the two-dimensional landscape of plane geometry.

[with thanks to muriel]

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