Plane Geometry Software

Xah Lee, 1997, 2011-01

Many files of various math software are used on this site and can be downloaded free.

Mathematica

Mathematica icon Mathematica is a general purpose software for doing mathematics. There are about 90 Mathematica notebooks on this site, and about 10 Mathematica packages. See Mathematica Packages for Plane Curves.

Mathematica home page: wolfram.com.

GeoGebra

GeoGebra is a interactive plane geometry software. It is free and written in Java and can be used directly in your web browser as java applets. You will need to have Java installed. As of 2008-03, there are 50 GeoGebra files in this project.

GeoGebra home page: http://www.geogebra.org/.

Geometer's Sketchpad

gspIcon Geometer's Sketchpad (GSP) is a interactive plane geometry software.

There are currently 117 GSP files on this site. They will be gradually replaced with GeoGebra.

Here are some info about GSP's file type.

◇	MINE type	file name suffix	Mac file type code	Mac creator code
sketchs	application/x-gsp	.gsp	GSPb	GSP+
scripts	application/x-gss	.gss	GSPc	GSP+

Note: for GSP versions before 4 (roughly before 2001), the file type for sketch files should be “GSPk”, and the creator code should be “GSP!”

Cabri Geometry

Cabri Geometer II is a interactive plane geometry software. for mor info, see http://www.cabri.com/. Cabri files on this site has this icon:

Here are some info about Cabri's file type.

	MINE type	file name suffix	Mac file type code
figures	application/x-cabri	.fig	FIGU
macros	application/x-cabri-macro	.mac	MACR

There are 24 Cabri files on this site. They will be gradually replaced by GeoGebra.

Graphing Calculator

Graphing Calculator is a program that plots curves and surfaces, with many interactive features that let you move a slider to change paramter. You'll find graphing calculator files with this icon: gcf icon . Its file has suffix gcf. It is available for Windows and Mac. Its home page is http://www.nucalc.com/.

There are 71 gcf files on this site.

QuickTime Movies

Throughout this site you'll find downloadable QuickTime movies with an movie icon icon. To view these movies, you need QuickTime plugin installed. Download at: apple.com quicktime.

PDF

This website also has documents in Adobe PDF format. ( files names ending in “.pdf” suffix.) You will need “Adobe Reader” to open them. It can be downloaded free at Adobe website: adobe.com.