Drei Entdeckungen mit Hilfe von Software für Dynamische Geometrie (DGS)
DOI:
https://doi.org/10.18716/ojs/md/2005.1054Abstract
Working with dynamic geometry software in the geometry course in the in-service teacher training, the author discovered several facts from elementary geometry which were new to him. These facts will be presented in the article together with proofs in classical style.