Amazing Origami - Tapa dura

A complete introduction to the mathematical theory of Origami based on the teachings of Freidrich Froebel (1782-1852) and a step-by-step guide to 33 colourful and fun paper folding projects which are in themselves 3-dimensional proofs of geometric principals: * Spiral * Star * Octagon * Pentagon * Hexagon * Heptagon * Pyramid * * 16-, 17-, 18- and 24- sided polygons * Super Tangram * Polyhedron * * Tetrahedron * Octahedron * Icosahedron * Dodecahedron * Creating these projects is a little like solving a puzzle. Learn a lot of interesting facts about angles when you construct a pinwheel, a crow's head and a plot of grass, for example, and discover how you can use an origami square to fashion as large a hexagon as possible.