The close collaboration of these two elementary geometric tools, namely the unmarked ruler and the compass, has always been fruitful, from Antiquity to modern computer graphics, including the practices of medieval builders.
Together with these two instruments, art lovers and geometry enthusiasts will be charmed by these delicate constructions created on a sheet of paper by the pencil guided by the ruler and compass. They will be able to relive the long and exciting saga of angle trisection, discover approximate circle quadratures, and marvel at the ingenuity of the Ancients grappling with cube duplication. For this issue also discusses certain dead ends. But even when they were not crowned with success, construction attempts led to new practices: plotting curves point by point, use of clever instruments, inventive paper folding, graphical tricks…
The files
Two instruments in history Methods and constructions Practices of yesterday and today Beyond the ruler and compass

The geometry of the ruler and compass

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