The end
[color=#0000ff][size=200][br][br]Thank you![/size][/color]
You can scan this QR code to get this GGB book with the links to more detailed information.
Also you can seach https://www.geogebra.org/m/c9rp37v7
[url=https://www.geogebra.org/m/c9rp37v7]https://www.geogebra.org/m/c9rp37v7[br][br][br][/url]