Ellipsenkonstruktion von Albrecht Dürer (1525) No 1

Autor:
René Schelldorfer
Thema:
Kegel, Ellipse
Corresponding applet see https://www.geogebra.org/m/T63KZtRf Explanation see https://pavlopoulos.wordpress.com/2009/07/27/albrecht-duerers-eyer-lini/