Böcker av Marc Kirschenbaum

This artful collection of 40 origami projects brings mathematics to life through the geometry of folded paper. You'll explore properties of triangles, parallelograms, and rhombuses by folding them from squares. You'll fold and arrange pentagons to form beautiful multicolored patterns that tile a floor. And you'll construct the classic Tangram shapes, using them to create and solve puzzles. Teachers, parents, origami enthusiasts, and mathematics learners of all ages will find much to enjoy in this delightful fusion of origami and math.

Create a collection of origami paper dolls comprising of standalone pieces and eight body parts that can be combined to make a total of twenty-one dolls. Detailed illustrations will guide you in folding these works, and you can explore your creativity by combining different color patterns. Many hours of folding fun are to be found here.

Get your money's worth with this clever kit! Dollar Origami Kit features instructions for folding 7 fun and easy money origami projects. These cute paper sculptures make perfect gifts and tips--in fact, they are almost too good to give away! This kit includes step-by-step instructions for folding a dollar bill into: Butterfly--This model looks as if it could fly away (and not just because it's made of money!)Mouse--Don't let this lifelike project startle its recipientElephant--A wonderful option when loaning cash: elephants never forget!Giraffe--Folding this delightful figure isn't a tall order, even for beginnersBunny--With just 15 steps, your folding speed will rival this model's namesakeDog--This sweet project is difficult to resist, even with paper puppy dog eyesCat--This feline figure makes a good companion, ready to prowl any desk or shelfWith a full-color instruction book, free online video tutorials and 60 practice "dollar bills," this kit has everything you need to get started.

Origami and Puzzles share a number of similarities, including attracting the interest of some of the same practitioners. Both can appear simple on the surface, but often contain interesting inner workings. They often exploit mathematical relationships so things fit together well. Some puzzles work very well as origami models and the pieces diagrammed here showcase that marriage. All of these works are based on existing puzzle designs, most of which are traditional dissection style challenges. Providing the opportunity to fold your own pieces makes the geometric relationships of the pieces more apparent, but not necessarily easier to solve. Every effort was made to have the pieces for these puzzles begin with the same sized square.