Introduction |
Until the Publication of the English Edition |
Acknowledgments |
Preface for the English Edition |
A Point Opens the Door to Origamics / 1: |
Simple Questions About Origami / 1.1: |
Constructing a Pythagorean Triangle / 1.2: |
Dividing a Line Segment into Three Equal Parts Using no Tools / 1.3: |
Extending Toward a Generalization / 1.4: |
New Folds Bring Out New Theorems / 2: |
Trisecting a Line Segment Using Haga's Second Theorem Fold / 2.1: |
The Position of Point F is Interesting / 2.2: |
Some Findings Related to Haga's Third Theorem Fold / 2.3: |
Extension of the Haga's Theorems to Silver Ratio Rectangles / 3: |
Mathematical Adventure by Folding a Copy Paper / 3.1: |
Mysteries Revealed from Horizontal Folding of Copy Paper / 3.2: |
Using Standard Copy Paper with Haga's Third Theorem / 3.3: |
X-Lines with Lots of Surprises / 4: |
We Begin with an Arbitrary Point / 4.1: |
Revelations Concerning the Points of Intersection / 4.2: |
The Center of the Circumcircle! / 4.3: |
How Does the Vertical Position of the Point of Intersection Vary? / 4.4: |
Wonders Still Continue / 4.5: |
Solving the Riddle of "1/2" / 4.6: |
Another Wonder / 4.7: |
"Intrasquares" and "Extrasquares" / 5: |
Do Not Fold Exactly into Halves / 5.1: |
What Kind of Polygons Can You Get? / 5.2: |
How do You Get a Triangle or a Quadrilateral? / 5.3: |
Now to Making a Map / 5.4: |
This is the "Scientific Method" / 5.5: |
Completing the Map / 5.6: |
We Must Also Make the Map of the Outer Subdivision / 5.7: |
Let Us Calculate Areas / 5.8: |
A Petal Pattern from Hexagons? / 6: |
The Origamics Logo / 6.1: |
Folding a Piece of Paper by Concentrating the Four Vertices at One Point / 6.2: |
Remarks on Polygonal Figures of Type n / 6.3: |
An Approach to the Problem Using Group Study / 6.4: |
Reducing the Work of Paper Folding; One Eighth of the Square Will Do / 6.5: |
Why Does the Petal Pattern Appear? / 6.6: |
What Are the Areas of the Regions? / 6.7: |
Heptagon Regions Exist? / 7: |
Review of the Folding Procedure / 7.1: |
A Heptagon Appears! / 7.2: |
Experimenting with Rectangles with Different Ratios of Sides / 7.3: |
Try a Rhombus / 7.4: |
A Wonder of Eleven Stars / 8: |
Experimenting with Paper Folding / 8.1: |
Discovering / 8.2: |
Proof / 8.3: |
More Revelations Regarding the Intersections of the Extensions of the Creases / 8.4: |
Proof of the Observation on the Intersection Points of Extended Edge-to-Line Creases / 8.5: |
The Joy of Discovering and the Excitement of Further Searching / 8.6: |
Where to Go and Whom to Meet / 9: |
An Origamics Activity as a Game / 9.1: |
A Scenario: A Princess and Three Knights? / 9.2: |
The Rule: One Guest at a Time / 9.3: |
Cases Where no Interview is Possible / 9.4: |
Mapping the Neighborhood / 9.5: |
A Flower Pattern or an Insect Pattern / 9.6: |
A Different Rule: Group Meetings / 9.7: |
Are There Areas Where a Particular Male can have Exclusive Meetings with the Female? / 9.8: |
More Meetings through a "Hidden Door" / 9.9: |
Inspiraration of Rectangular Paper / 10: |
A Scenario: The Stern King of Origami Land / 10.1: |
Begin with a Simpler Problem: How to Divide the Rectangle Horizontally and Vertically into 3 Equal Parts / 10.2: |
A 5-parts Division Point; the Pendulum Idea Helps / 10.3: |
A Method for Finding a 7-parts Division Point / 10.4: |
The Investigation Continues: Try the Pendulum Idea on the 7-parts Division Method / 10.5: |
The Search for 11-parts and 13-parts Division Points / 10.6: |
Another Method for Finding 11-parts and 13-parts Division Points / 10.7: |
Continue the Trend of Thought: 15-parts and 17-parts Division Points / 10.8: |
Some Ideas related to the Ratios for Equal-parts Division based on Similar Triangles / 10.9: |
Towards More Division Parts / 10.10: |
Generalizing to all Rectangles / 10.11: |
Where to go and Whom to Meet |
Introduction |
Until the Publication of the English Edition |
Acknowledgments |