Keywords: DescartesPappusProblemWaud.jpg en Descartes' solution to Pappus' Problem in Samuel Wilkes Waud A Treatise on Algebraical Geometry 1835 p 148 2016-11-19 A Treatise on Algebraical Geometry 1835 p 148 Samuel Wilkes Waud other versions PD-old-70-1923 René Descartes Geometry diagrams |