



 Analyzing folding on a square paper








 explore some figures created with square paper folding






 A fold on a rectangular paper






 Folding two opposite vertices of a square paper






 Make a special triangle with a square paper






 Fold to make a bisector of a triangle






 Distinguishing bisectors of a triangle






 Making shapes with reflectional symmetry






 Make a fold on half of a square paper, the first step for folding a regular hexagon or regular pentagon. The methods are based on folding a 60 deg angle at center (for hexagon) and an approximate of 36 or 72 deg angle (for pentagon).





 These methods are explained in: 1. Unfolding Mathematics with Unit Origami by Betsy Franco, Activity 6 & 8. 2. Amazing Origami by Kunihiko Kasahara, pp.18 & 2829 3. The Regular Pentagon by Jim Loy (http://www.jimloy.com/geometry/pentagon.htm) , addendum #2





 Here are photos of some examples of monkiri.






