Last Update 22/ 10/ 2007
in English/ in Esperanto/ in Portuguese
This game presents in the figure below a black octahedron in perspective
in a cartesian referential and a symmetry element either a tetrad
rotation axis or a triad
axis or a binary axis
or a mirror plane
or the inversion center
in red and one of the eight Miller
indices of the octahedron faces in red parenthesis. The game comes
to end after a click on all the Miller indices (at least one and
maximum of three) defining planes obtained by the operation of the given
symmetry element on the plane with the Miller indices in red parenthesis.
Each correct choice is scored by a funny face and bad choice with a
bad face. Finally the starting time and end time is given.
Please send your comments.
Table of subjects.