Category: GeoGebra

15 Reasons Why GeoGebra is Successful

GeoGebra

Michael Borcherds, lead developer of GeoGebra, asked why GeoGebra is successful  in the GeoGebra Forum;  I summarized the responses and came up with 15 reasons.  Here are the reasons why GeoGebra has been so successful all these years.

  1. It is FREE.
  2. It is open source – meaning, it is developed collaboratively by us: programmers, teachers, mathematicians, and users.  Not just a few people.
  3. It runs in multiple operating systems (Windows, Mac, Linux, etc.).
  4. It runs in different devices (computers, mobile phones, tablets).
  5. It promotes mathematical connections (algebra, geometry, calculus, statistics, etc.).
  6. It highlights  multiple representations (equations, graphs, tables).
  7. It is intuitive, user-friendly, and easy to use.
  8. Its files can be easily uploaded to the web as applets.
  9. It can be exported to different file formats (png, pdf, eps, etc.).
  10. It supports Latex typesetting.
  11. It supports spreadsheet, CAS, and 3D (GeoGebra 5.0).
  12. It has elegant appearance and dynamic colors.
  13. It has excellent support community.
  14. It can be used by elementary school students up to graduate school students.
  15. It is updated frequently — actually, almost everyday.
Can you think of others?
If you haven’t tried GeoGebra yet, it’s time that you do. 
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GeoGebra Offline Installers, GeoGebra 4.2 Beta, and GeoGebra 5.0 Beta

GeoGebra

To those who are using computers which are not connected to the internet,  you can now download the GeoGebra 4.0 offline installers and install it in your PCs or Macs.

The development GeoGebra 4.2 and GeoGebra 5.0  has also been started. In GeoGebra 4.2 the computer algebra system will be improved, while 3d is the major addition to GeoGebra 5.0.

A screenshot from GeoGebra 5.0 Beta

GeoGebra 4.2 (JNLP file),can be downloaded  here and read its  release notes can be viewed here.

GeoGebra 5.0 (JNLP file), can be downloaded here. If you have trouble running GeoGebra 5.0, be sure that 3d is running on your computer.

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GeoGebra Extra: The Construction Protocol

GeoGebra

When a geometric drawing or construction is done in GeoGebra, the steps are recorded in the Construction Protocol. The Construction Protocol contains the steps of how geometric constructions are made.  This way, other users of the GGB file would be able to examine the steps and repeat the construction.

Another use for the Construction Protocol is when checking if a particular construction made used the required steps or if they are mathematically correct. For instance, students may construct equilateral triangles using the Regular polygon tool instead of the using two circles (see figure above) to mimic compass and straightedge construction.

The Construction Protocol can be displayed by using the View menu. The arrows can be used to display graphically how a construction is made.  While using the arrow, the construction is reconstructed and the corresponding steps are highlighted.

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