Personal information
This user studies at the Karlsruhe Institute of Technology. BSc This user holds a Bachelor of Science degree. This user plays chess. This user plays the piano.

Hello, this is Mathmensch. Having been banned from two Wikipediae, I now mainly write wikibooks. You may contact me on any of my talk pages, but if you have a comment regarding a particular project, it probably makes sense to use the talk page on that very project.

You may visit a printing store and have them printed on an A4 sheet of sticky paper. (The keys will be the correct size, but you have to cut the sheet yourself.)

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  Saw mill of Marcus Aurelius Ammianos
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  Construction of a parallelogram with ruler and compass
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  Some ordinal numbers
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  The decomposition of octane into butane and butene
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  The axial tilts (aka obliquity) of the earth and the moon
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  The so-called "Dandelin spheres" that prove that a closed conic section is an ellipse
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  Alhazen's geometrical proof of the formula for the sum of the first n numbers