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I am writing a math exam and I'd like to include a picture. I want a free drawing program so that I can draw the coordinate axes with a unit circle. Inscribed in the unit circle will be a hexagon. The interior of the hexagon will be divided into triangles. Which drawing program will make this process as painless as possible?

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GeoGebra – pedja Feb 4 '12 at 20:06
See also Software for drawing geometry diagrams (many of the suggestions there would work for much more than just geometry diagrams). – Isaac Feb 5 '12 at 2:06
For general-purpose drawing, I use Inkscape. – Ben Crowell Feb 5 '12 at 4:25
up vote 10 down vote accepted

You can see a good list at Wikipedia.

I suggest you try GeoGebra, which is convenient for geometric constructions (for more general things, Inkscape is very good).

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A very good wiki to share, thank you very much. – Kerim Atasoy Apr 29 '12 at 0:05

Since you mention nowhere that your program has to include a GUI, TikZ is always mentionable (although I know that if this is just a quick assignment for an exam, even using LaTeX might seem like overkill).

You can look at the official documentation here:

and some different examples here:

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I use ipe for all my figures. Snapping, vector graphics, and the ability to include latex are some of the standout features.

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