Euclid's Big Problem

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

Trisecting angles and calculating cube roots was a big problem for Euclid and his cohorts. Discussed by Zsuzsanna Dancso at MSRI.

TRISECT WITH ORIGAMI: http://youtu.be/SL2lYcggGpc
CIRCLE THE SQUARE: http://youtu.be/CMP9a2J4Bqw