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There are two traditional methods for making polyhedra out of paper: polyhedral nets and modular origami.In the net method, the faces of the polyhedron are placed to form an irregular shape on a flat sheet of paper, with some of these faces connected to each other within this shape; it is cut out and folded into the shape of the polyhedron, and the remaining pairs of faces are attached together.
The fold-and-cut problem asks what shapes can be obtained by folding a piece of paper flat, and making a single straight complete cut. The solution, known as the fold-and-cut theorem, states that any shape with straight sides can be obtained. A practical problem is how to fold a map so that it may be manipulated with minimal effort or movements.
Martin Gardner included this fold, described as both a bug catcher and fortune-teller, in a column in Hugard's Magic Monthly, titled "Encyclopedia of Impromptu Magic", in the 1950s. [22] Although the phrase "cootie catcher" has been used with other meanings in the U.S. for much longer, [ 23 ] the use of the phrase for paper cootie catchers in ...
The Miura fold (ミウラ折り, Miura-ori) is a method of folding a flat surface such as a sheet of paper into a smaller area. The fold is named for its inventor, Japanese astrophysicist Kōryō Miura. [1] The crease patterns of the Miura fold form a tessellation of the surface by parallelograms.
How to fold a square ddakji from two square sheets of paper. Ddakji (Korean: 딱지; RR: ttakji; MR: ttakchi) [a] is a traditional Korean toy used primarily to play variants of a category of games called ddakji chigi (딱지치기; ttakji chigi; ttakchi ch'igi; lit. playing/hitting ddakji). They are usually made of paper and are thrown in some ...
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John Montroll was born in Washington, D.C. [1] He is the son of Elliott Waters Montroll, an American scientist and mathematician.He has a Bachelor of Arts degree in Mathematics from the University of Rochester, a Master of Arts in Electrical Engineering from the University of Michigan, and a Master of Arts in applied mathematics from the University of Maryland.