On Euler’s Synthetic Demonstration of Pappus ’ Construction of an Ellipse from a Pair of Conjugate Diameters

Copyright c © 2013 Brian J. McCartin. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This expository paper reviews Pappus ’ construction of an ellipse from a pair of conjugate diameters [3] together with Euler’s synthetic demonstration [2] of 1750(3)