a ride through the polyhedra world
other related subjects (constructions, packing, art…)
ENGLISH version

constructions of regular polygons and useful diagrams
the golden ratio  -  the format A (A4 paper sheet)
discrete plane symmetry groups
the 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
two 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...
perspective and projective geometry with LiveGraphics3D:
  the perspectives of a circle  -  Desargues' theorem
the inversion
packing spheres: the CCP and the "kissing spheres"
colour codes (applets)
"night view" of our planet (NASA picture)
brief survey of New-Caledonia, "the island nearest to the paradise"

summary   convex polyhedra - non convex polyhedra - interesting polyhedra