[list][*]All the images and GeoGebra constructions referenced in this article can be viewed in color and downloaded from this GeoGebra book.[/*][/list][list][*]The images appearing in this article have either been created by the authors or are in the public domain. The photograph of one of the authors, appearing in Figure 4, is courtesy of Professor Csaba Sárvári (University of Pécs).[/*][/list][list][*]The second author is partially funded by the research project PID2020-113192GB-I00 (Mathematical Visualization: Foundations, Algorithms, and Applications) from the Ministry of Science and Innovation (MICINN).[/*][/list]