"This book tells the story of the pentagon and its cousin, the pentagram, delving into the shapes' history, mathematical features, cultural significance, and their role in nature, science, and art. While the pentagon may seem to be a quotidian shape, it has a fascinating history. It was a favorite symbol of the Pythagoreans, a cult who reportedly used the shape to identify themselves to other members. Over the years, it became a source of fascination...