Pythagoras Theorem

A two and a half dimension version of an illustration of Pythagoras Theorem.  It is one of the most recognisable figures in geometry, perhaps in all of mathematics.  

The theorem was named after the Greek Pythagoras, who lived around 570 BC. Apparently, however, it was known well before Pythagoras, in Egypt, Babylon, India, and other places.  It was also proven in many ways.  

This 2-1/2 D model was made with coffee stirrers and toothpicks, without glue.