Origami Geometry Stars Boxes Troublewits Chess More Author:John Montroll Step-by-step instructions teach you how to fold over 40 geometrically inspired original projects. Each model is folded from a square sheet, using geometric properties to create a wide variety of two and three dimensional models. Geometric concepts are explained throughout this work. 2D color pattern models include the Sierpinski Triangle, Marble... more » Square, Radioactive Hexagon, stars, and more. 3D models include boxes, troublewits, prisms, antiprisms, diamonds, and antidiamonds. Also shown are Tic-tac-toe and chess boards with pieces. Models range from simple to very complex.« less