Le monde des symétries - Colegiul Național din Iași (Iași - Roumanie)

The purpose of this problem was to both stimulate our analytical thinking and to use our interest
in solving and exploring mathematics. This problem has taught us to approach a thing from as many
perspectives as possible but also encouraged us to use our logical thinking and creativity.
Using the 4 different types of transformation, we were able to discover 17 ways in which we can
cover the plane. These were as many unique ways as we could find, any other experiment becoming
the same process as another one we had discussed before.