WinTriangle: Math and physics for the blind

The WinTriangle logo



Version 3.0.0a now available for download

WinTriangle is a scientific word processor the blind, developed by John Gardner at Oregon State University. This program allows blind or visually impaired users to read and write complex mathematics -- it serves the role of pen and paper for a blind mathematician or physicist. Sighted people can read the output in Word once they have installed the font files, Triangle.ttf and MTExtra.ttf. Users of WinTriangle can read LaTeX files by converting them to Triangle with LaTeX2Tri.
    The Triangle representation of the integral of x dx


Version 3.0.0a WinTriangle install file for Windows:   WinTriangle_Install_3.0.0a.exe

Version 2.0.0a WinTriangle install file for Windows XP:   WinTriangle_Install_2.0.0a.exe

Newer versions of Windows XP come with .NET Framework 1.1 installed. If you have an older version of XP, you may need to install .NET Framework 1.1 before you can install WinTriangle version 2.0.0a


The following two documents are useful for both blind users of WinTriangle and sighted people who wish to communicate with a blind user of WinTriangle. For a full list of software programs that assist the blind, visit this article on web accessibility standards kindly provided by this Internet service site. Sighted people must install the fonts Triangle.ttf and MTExtra.ttf before opening these documents in Word:

         Introduction to the Triangle symbols and their usage, RTF
         List of Triangle symbols, RTF

For the blind user of WinTriangle:

         Introduction for WinTriangle users, RTF
         A list of key shortcuts, RTF

As of 2013, WinTriangle has an iPad app. To hear instructions on how to use such apps spoken aloud in a video, go to Mobile Informers and visit the section on how to use the iPad.


WinTriangle is an open-source project. Source files may be accessed at the main development site run by the Technology Access Program at Oregon State University.

WinTriangle was originally developed by the Science Access Project at Oregon State University, headed by Professor John Gardner, who may be reached by email at or through his web site

Questions or problems with this web site should be directed to David M. Thompson, who may be reached by email at or through his web site.