Configuration space of equilateral and equiangular hexagons

Deformation of a boat

Ref. The configuration space of equilateral and equiangular hexagons, Osaka J. Math.

the bond angle = pi / 4 

the bond angle = pi / 3 - epsilon (0.05)

the bond angle = pi / 3 (this is not the limit of the deformations when the bond angle = pi / 3 +- epsilon)

the bond angle = pi / 3 + epsilon (0.05)

the bond angle = pi / 2

the bond angle = arccos(-1/3)