A visual proof that a^2 – b^2 = (a + b)(a – b)(futilitycloset.com)

634 points by beardyw 1 year ago | 174 comments

A Futility Closet blog post showing a diagrammatic visual proof that a² − b² = (a + b)(a − b), with a Sophie Germain quote.

The Sylvester–Gallai Theorem(futilitycloset.com)

30 points by surprisetalk 2 months ago | 29 comments

Rivers(futilitycloset.com)

57 points by surprisetalk 1 year ago | 5 comments

Bus Bunching(futilitycloset.com)

65 points by surprisetalk 1 year ago | 86 comments

Bhartrhari's Paradox(futilitycloset.com)

38 points by surprisetalk 1 month ago | 51 comments

Velato(futilitycloset.com)

8 points by surprisetalk 10 months ago | 2 comments