Installing the Hyperbolic tools for GeoGebra
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Below are the instructions for installing hyperbolic construction
tools in GeoGebra. I developed the tools using GeoGebra version
4.2, and the tools have been tested in v.5.0 of the software.
- The file klein.ggb contains a sketch of the Beltrami-Klein disk as well as the associated tools. To import only the tools into an existing sketch, download the file klein.ggt and open that file in your existing sketch. Note that the tools all assume that the Klein disk is bounded by the circle centered at (0,0) with radius 1.
- The file poinhalf.ggb contains a sketch of the Poincaré half-plane as well as the associated tools. To import only the tools into an existing sketch, download the file poinhalf.ggt and open that file in your existing sketch. Note that the tools all assume that the Poincaré half-plane is the region above the x-axis in the plane.
- The file poincare.ggb contains a sketch of the Poincaré disk as well as the associated tools. To import only the tools into an existing sketch, download the file poincare.ggt and open that file in your existing sketch. Note that the tools all assume that the Poincaré disk is bounded by the circle centered at (0,0) with radius 1.
| 1. | Make sure that you have a working copy of GeoGebra. This open-source software can be downloaded for free from http://www.geogebra.org. |
| 2. |
Download the desired tools into your preferred directory. I recommend
creating a separate directory (perhaps "hyptools" or something like
that) to hold the different GeoGebra files. Note:
the constructions involved in building the hyperbolic toolboxes are
Euclidean rather than analytic. That is, they are created using standard
Euclidean straightedge and compass constructions. However, in order to
simplify tool usage, the Klein and Poincaré disk construction assume
that the defining disk is bounded by the unit circle, while the Poincaré
half-plane constructions assume that the bounding line for the half-plane is the
x-axis.
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