|constructions of regular polygons and useful diagrams
the golden ratio - the format A (A4 paper sheet)
the discrete plane symmetry groups
|les regular polygons and the regular polytopes
the nets of the rectangular cobblestones and of the parallelepipeds
folding a cross
|the riding prospect (parallel perspective) - drawing polyhedra in perspective
examples of proofs by moving from 2D into 3D
|polyhedra and art: classical - modern - architecture
two compositions by Nicolas Hannachi: polyhedra - kissing spheres
news (research): 3D printing, invertible polyhedra...
|the perspectives of a circle
packing spheres: the CCP and the "kissing spheres"
views of the earth: night view, air traffic, ocean pollution (NASA)
brief survey of New-Caledonia, "the island nearest to the paradise"