Hexagonal billiard - kopio
There are three kinds of billiard trajectories:
- periodic - quasiperiodic - chaotic
Roughly speaking, the more uniformly angles disributed,
the more chaotic trajectories behavior.
It is known that in polygonal billiard always there is periodical trajectory.
Make a regular hexagon, some convex polygon and some non-convex
and try to find periodical paths!