Alameda Post on MSN

Math puzzle for July 10, 2026

Jeff Smith's Math Puzzle for July 10, 2026: Two ellipses accidentally intersect — no injuries reported. The post Math Puzzle ...
Nature

Formula for the Perimeter of an Ellipse

WILL one of your mathematical readers kindly state whether the following empirical formula gives a nearer approximation to the perimeter of an ellipse than that usually given in pocket-books of ...