19 October 2020

Detection of perpendicular lines in GeoGebra Discovery

In this new update of GeoGebra Discovery you can discover perpendicularities in a given planar figure. I decided to add this feature as soon as possible to support secondary school experiments, including the discovery of Thales' circle theorem.


Now… (you may need to click OK first on the applet below…)
  1. Click on the Discover tool.
  2. Select a point, say \(D\).
  3. The list of found properties should be shown in a popup window.
This new version has been released today.

A further example




Continue reading…

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Zoltán Kovács
Linz School of Education
Johannes Kepler University
Altenberger Strasse 69
A-4040 Linz