 | |
 GeoGebra 4.4.3.0 (HTML5 version) | |
| Developer(s) | Markus Hohenwarter et al |
|---|---|
| Stable release | 6.0.876 (18 February 2025 (2025-02-18)) [±] |
| Preview release | (none)[1] [±] |
| Repository | github |
| Written in | Java,HTML5 |
| Operating system | Windows,macOS,ChromeOS,Linux; also aweb app |
| Type | Interactive geometry software |
| License | GeoGebra License;[2] Non-commercialfreeware; portions underGPL,CC-BY-NC-SA |
| Website | geogebra |
GeoGebra (aportmanteau ofgeometry andalgebra) is aninteractive geometry,algebra,statistics andcalculus application, intended for learning andteaching mathematics and science from primary school to university level. GeoGebra is available onmultiple platforms, withapps for desktops (Windows,macOS andLinux), tablets (Android,iPad andWindows) andweb. It is presently owned by Indianedutech firmByju's.[3]
GeoGebra's creator, Markus Hohenwarter,[4] started the project in 2001 as part of his master's thesis at theUniversity of Salzburg. After a successfulKickstarter campaign, GeoGebra expanded its offering to include aniPad, anAndroid and aWindows Store app version.[5] In 2013, GeoGebra incorporated Bernard Parisse'sXcas[6] into its CAS view.[7] The project is nowfreeware (withopen-source portions) andmulti-lingual, and Hohenwarter continues to lead its development at theUniversity of Linz.
GeoGebra includes both commercial and not-for-profit entities that work together from the head office inLinz, Austria, to expand the software and cloud services available to users.
In December 2021, GeoGebra was acquired by edtech conglomerateByju's for approximately $100 million USD.[3]
On January 25, 2024, lenders began bankruptcy proceedings against GeoGebra's parent company Byju's in an effort to repay its loans.[8] On February 1, 2024, Byju's U.S. division filed forChapter 11 bankruptcy in Delaware. Byju's would raise around $200 million in an effort to clear "immediate liabilities" and for other operational costs.[9]
GeoGebra is an interactive mathematics software suite for learning and teachingscience, technology, engineering, and mathematics from primary school up to the university level. Constructions can be made with points, vectors, segments, lines, polygons, conic sections, inequalities, implicit polynomials and functions, all of which can be edited dynamically later. Elements can be entered and modified using mouse and touch controls, or through aninput bar. GeoGebra can store variables for numbers, vectors and points, calculate derivatives and integrals of functions, and has a full complement of commands like Root or Extremum. Teachers and students can use GeoGebra as an aid in formulating and proving geometric conjectures.
GeoGebra's main features are:
The GeoGebra Materials platform[11] is a cloud service that allows users to upload and share GeoGebra applets with others. GeoGebra Materials was originally launched asGeoGebraTube in June 2011, and was renamed in 2016. As of April 2016 the service hosts more than 1 million resources, 400,000+ of which are public. "Materials" include interactive worksheets, simulations, games and e-books created using GeoGebraBook.
GeoGebra Materials can be also exported in several formats, includingSVG,Animated GIF,Windows Metafile,PNG,PDF andEPS, as well as copied directly to the clipboard. GeoGebra can also generate code for use inLaTeX files.
Before version 4.2, GeoGebra was published under theGNU General Public License (GPL-3.0-or-later).
After version 4.2 the licensing was changed.[12] GeoGebra's source code, except the installers, web services, user interface image and style files, and documentation and language files, is licensed under theGNU General Public License (GPL-3.0-or-later). The installers and web services are released under GeoGebra's ownproprietary license. User interface image and style files, and documentation and language files are published under theCreative Commons NonCommercial license (CC BY-NC-SA 3.0). Commercial use is subject to a special license and collaboration agreement.[13]
Since parts of GeoGebra not licensed under a GPL compatible license are required to build the program,[14] and since GeoGebra includes GPL licensedlibraries,[15] some users,[16][17][18] including a maintainer of one of the libraries used by GeoGebra,[19] consider the license invalid. In response,[20] the InternationalGeoGebra Institute, and GeoGebra's creator, Markus Hohenwarter, have provided a licenseFAQ.[21]
The International GeoGebra Institute (IGI) is thenonprofit arm of the GeoGebra Group. The institute coordinates research, development, translation and deployment efforts of the GeoGebra system across a global network of user groups at universities and non-profit organizations, as well as provide certification to GeoGebra experts and trainers.
Following a closer inspection at the licensing terms GeoGebra authors use, I noticed that GeoGebra isn't free anymore, starting from version 4.2.
[...] at least the language files are required to build the program.
However, if the language file carries a GPL-incompatible license (such as CC-BY-SA), the resulting product cannot be distributed in a legal way.
Besides the fact that it seems invalid, it also ships Jlatexmath (which I co maintain) which is published under the GPL v2.
Media related toGeoGebra at Wikimedia Commons
