Non-Euclidean Geometry Online: A Guide to Resources (2008)(pi.math.cornell.edu)36 points by the-mitr 3 years ago | 5 comments
Music and Geometry: Intervals and Scales(roelsworld.eu)178 points by coloneltcb 1 year ago | 52 comments
A seventh-grader student found a beautiful proof to Thales' Theorem (2002)(cut-the-knot.org)113 points by samdung 2 years ago | 76 comments