Gallery image: Talk in Wilmington, Mass.

Chris Rycroft giving a talk on The Wonder of Pi at the Wilmington Memorial Library, demonstrating that atan(1/2)+atan(1/3) is equal to π/4. This can be used as the basis of an efficient formula for calculating π.

Image by: Charlotte Wood
Date: Mar 12, 2015
Resolution: 4608 × 3456