btw Pi = 4 (in taxicab geometry aka L1) http://math.stackexchange.com/questions/96835/are-there-any-geometries-spaces-where-pi-is-a-simple-or-at-least-rational

btw Pi = 4 (in taxicab geometry aka L1) http://math.stackexchange.com/questions/96835/are-there-any-geometries-spaces-where-pi-is-a-simple-or-at-least-rational-cons http://math.stackexchange.com/questions/96835/are-there-any-... Euclidean geometry is not the only one and some physical problems are solved using spaces in which pi is NOT 3.1459 ;)