# Software for drawing geometry diagrams

What software do you use to accurately draw geometry diagrams?

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For geometry I've always used Geogebra, and I think it's pretty good.

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One of the best is WinGCLC.

Graph quality is really exceptional, it's easy to use, can be easily exported to SVG/EPS/BMP/LaTeX, supports command line for scripting, supports animation...

What is really useful is that once you define all the points/lines/intersections/circles, you can easily change the location of one of the starting objects and the whole diagram will be accurately redrawn.

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Asymptote is my tool of choice for virtually any mathematics diagram, geometry included.

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If you are a mathematician and wants to use such pictures for your notes or presentations using TeX files, use the pstricks package enhanced for use of easy by the package LaTeXdraw.

Then there is a very useful linux program called xfig.

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LaTeXDraw is a graphical front end for PSTricks.

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I've used Smile by Satimage on my Mac. (Not SmileLab, just the free Smile. And not to be confused with PDF utility company "Smile on My Mac")

Smile uses AppleScript for drawing. Some example files show an amazing facility for geometric drawings: named points, marked angles, primitives for things like barycenter and circumcenter, TeX-styled labels, etc. A fully-labeled illustration of the Euler Circle can be created with a few lines of script. Outputs to PDF, JPG, etc.

I always have lots of trouble navigating the online documentation, so I know I'm not getting the full benefit of the program. Nevertheless, the ability to describe a drawing precisely with a script is what I need, and it's what the app delivers.

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Live Geometry for Windows users.

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This is very expensive. A free, partial-alternative is wxMaxima. andrejv.github.io/wxmaxima/screenshots.html –  Rhubbarb Nov 7 at 23:56

Inkscape is a popular open source drawing package. One feature that makes it particularly nice for drawing mathematical diagrams is that you can easily insert LaTeX output in your drawings.

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I use the programme CaRMetal. Here are a few screenshots:

http://i34.tinypic.com/2vwcits.jpg

http://i35.tinypic.com/oa42ts.jpg

http://i35.tinypic.com/2lxfin8.jpg

http://i35.tinypic.com/rble9l.jpg

I guess most geometric constructions programmes are good, although I wouldn't recommend Kig.

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Metapost. There are a few packages to simplify drawing geometry drawings.

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These are my choices:

• Interactive software: Ipe produces postscript and pdf files, can include LaTeX labels and other text, and has helpful snapping modes.

• Non-interactive: Eukleides lets you design pretty high quality geometry diagrams with a simple language.

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Tikz is a nice LaTeX package for easily drawing diagrams. Diagrams are made by putting code directly into the TeX document, eliminating the need for extra image files. The package also is very powerful and versatile; the manual contains a very detailed description of its features.

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Tikz/pgf rocks! –  Dilawar Jan 3 '12 at 8:32

I have been enjoying kseg. It is very quick to draw diagrams in kseg.

After you draw the diagram you can drag the components around and the others will follow, retaining the same constraints. For example, in this diagram it appears that $NM$ is the perpendicular bisector of $PQ$:

And I can see if that still appears to be the case even after I move point $C$ to make a very different inscribed quadrilateral:

kseg also lets you define complicated loci, but I haven't tried that yet.

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The free version of Cinderella is in some cases also a good choice.

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# gnuplot

## Features

I used gnuplot (official website), which is open source and can produce a huge number of different file types. For instance, you can also output tikz-code if you want to work with LaTeX. It is used for plotting datasets and one can plot easily errorbars.

## Installation

You can download it from sourceforge or from your package database if you are using a linux distribution.

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