At the exhibition matemilano
In the section "Symmetry" of the exhibition matemilano there's an exhibit where you can compare and rotate two identical drawings to find out the rotations that map the figure in itself.
© Sabrina Provenzi
foto di Sabrina Provenzi
The image belongs to the sections...:
Layout (From the exhibitions of matematita)
Objects (From the exhibitions of matematita)
Symmetry (From the exhibitions of matematita)
Symmetry (From the exhibitions of matematita)
Further information:
http://matemilano.mat.unimi.it