Pythagorean bus stop

So as an adult and pillar of the community as a teacher I should certainly have grown out of certain things but sadly it seems this isn't the case.

I recently grabbed a bit of paper from a desk somewhere in the school. I wrote a note on it and put it in my folder. Later when I read the note I realised that there was a maths quiz on the other side. The artwork contained on it is reminiscent of some of the great works through the ages. A lineage that I certainly contributed to during my youth.

Many a bus stop has been graced with similar touches of genius. However I particularly like the creative use of the Hypotenuse in this example: