These are articles posted by The Fold editor all (who may or may not be the author; see byline for authorship). The Fold is the online magazine for members of OrigamiUSA. New articles are posted continuously over the two month period of each issue. To contribute to The Fold or for other questions, please see our FAQ.

### Diagrams: $$60^{\circ}$$ Star Module

by David Petty. Diagrammed by Nick Robinson
Diagrams for a $$60^\circ$$ Modular Star by David Petty

### Folding Waves, Part 1

Thomas Hull
This wave model is fun to fold and has a lot of math in it!

### Diagrams: Heart Variation

Diagrams for a heart variation based on a model by Edwin Corrie.

### Crease Pattern: Wave24

A pleated cone sliced by multiple planes creates this geometric model reminiscent of a breaking wave.

### Diagrams: Peacock

by Rikki Donachie
OrigamiUSA's 2011 Annual Collection included a peacock from Rikki Donachie made from a square. Here Rikki shares another peacock made from an A4 rectangle.

### Crease Pattern: One-Cut Double Happiness

by Erik Demaine, Martin Demaine, Liping Ma, Patsy Wang-Iverson
This paper presents a crease pattern for one-cut double happiness.

### Paper Review #8: Kraft Paper

In this review we'll have a closer look at Kraft paper. If you are into complex folds, this might just be the perfect paper for your test folds.

### Convention: Thoughts from PCOC 2011

by Robert Orndorff
A compilation of quotes from attendees of the 2011 Pacific Coast Origami Convention in Bellevue, Washington.

### Diagrams: Burr Puzzle

Diagrams for a classic puzzle, typically made of wood.

### Diagrams: Bracelet

by Robert Orndorff
Diagrams for a bracelet that appears woven.

### Math: The Golden Ratio in Origami

by Arnold Tubis, John Andrisan, and Christopher Pooley
Paper folding exercises involving the golden section of a line, the golden rectangle, and the golden triangle provide interesting geometry-teaching supplements.

### Diagrams: Double Sided Star of David

by Ilan Garibi
Diagrams for a Star of David from 6 units.

### Convention: 15th Anniversary Colombian Convention, 2011

by Andrew Hudson
Andrew Hudson reports on the 15th Anniversary Origami Colombia Convention, November 11-14, in Cali, Colombia.

### Crease Pattern: Trees

Crease patterns and video for two modular tree units with variations.

### Report: Christmas, Hawaii Style

by Ashley Nishihara
Thinking about some special decoration for the upcoming holidays? Here is a great project created by Kindergarten students at Oahu’s Le Jardin Academy that would work great for any special celebration.

### Convention: 29th CDO 2011

Italy is the place I chose for my first and second international conventions. Read inside why, and what happened from 8/12/2012 during four days of folding frenzy!

### Spotlight: Margherita Beloch

by Tom Hull
Learn some of the history of origami geometry, as well as the story of Margherita Liazzolla Beloch, the first origami mathematician!