How to use AR on your phone
Download the GeoGebra Augmented Reality App to your smartphone. You find instructions on how to do that here: https://www.geogebra.org/m/jhcywuqw
Open the app and search for a small round button above the blue part of the app that says AR - select that round button!
Check out the floor slowly, tap on your phone in case the app tells you that a floor was detected.
You can zoom using your fingers on the screen of your phone!