This second edition of Alexander Soifer’s How Does One Cut a Triangle? demonstrates how different areas of mathematics can be juxtaposed in the solution of a given problem. The author employs geometry, algebra, trigonometry, linear algebra, and rings to develop a miniature model of mathematical research.

A great resource for quilters, especially beginners, fat quarters are bundles of colorful, coordinating fabrics so all of the “choosing” is already done for them! From the owner of the Quilt Addicts Anonymous and Stashin' with Stephanie, Stephanie Soebbing, Fat Quarter Workshop features 12 quilt patterns and step-by-step projects using these convenient bundles, plus insightful details on how to choose fabrics and colors to use in your quilt projects. Also included are essential quilting techniques, such as free motion quilting, straight-line quilting, and more.

Did you know that any straight-line drawing on paper can be folded so that the complete drawing can be cut out with one straight scissors cut? That there is a planar linkage that can trace out any algebraic curve, or even 'sign your name'? Or that a 'Latin cross' unfolding of a cube can be refolded to 23 different convex polyhedra? Over the past decade, there has been a surge of interest in such problems, with applications ranging from robotics to protein folding. With an emphasis on algorithmic or computational aspects, this treatment gives hundreds of results and over 60 unsolved 'open problems' to inspire further research. The authors cover one-dimensional (1D) objects (linkages), 2D objects (paper), and 3D objects (polyhedra). Aimed at advanced undergraduate and graduate students in mathematics or computer science, this lavishly illustrated book will fascinate a broad audience, from school students to researchers.

This updated printing of the first edition of Colorado Mathematical Olympiad: the First Twenty Years and Further Explorations gives the interesting history of the competition as well as an outline of all the problems and solutions that have been created for the contest over the years. Many of the essay problems were inspired by Russian mathematical folklore and written to suit the young audience; for example, the 1989 Sugar problem was written in a pleasant Lewis Carroll-like story. Some other entertaining problems involve olde Victorian map colourings, King Authur and the knights of the round table, rooks in space, Santa Claus and his elves painting planes, football for 23, and even the Colorado Springs subway system.

· On trend contemporary projects that modernize traditional blocks, embrace minimalism, and rely on bold colors and contrast · Contains 12 modern quilt patterns that are great for any level sewer · Build skills with step-by-step instruction and photography, and tips on piecing, hand or machine appliqué and quilting, and finishing · Color theory, fabric selection, and elements of design are all clearly explained · Author Stephanie Soebbing is a savvy social media marketer with an e-commerce site, weekly podcast, and 40,000+ online followers

Pat Sloan--popular teacher, designer, and online radio-show host--teaches all you need to know to create triangles with ease. Take your skills to the next level with this second book in her beginner-friendly "Teach Me" series. You'll discover 13 different ways to sew triangles--at least one method will be just right for you! Learn to successfully sew half-square and quarter-square triangles, 60-degree triangles, flying geese, and more Gain confidence and get all your questions answered--Pat shares tons of tips throughout Spotlight triangles in 12 exciting patterns, ranging from small wall hangings to lap quilts to a bed-sized design

Turn Long Triangles into Vibrant Quilts the Easy AnglePlayTM Way. 42 dazzling blocks with easy-to-use cutting charts, piecing illustrations, and full-size template patterns. 6 eye-catching quilts with complete patterns and instructions. Mix and match blocks into your own dynamic quilts. Use AnglePlayTM plastic templates or make your own with the included template patterns. Step out of the ordinary and into a whole new world of piecing possibilities with quilts made from half-rectangle triangles. Margaret's AnglePlayTM method makes them a breeze to cut and piece. You'll create quilts with a sense of life, movement, and elegant curves, even though all the piecing is in easy straight lines.