Stellated Polyhedra |

Quick-and-Dirty constructions with Cabri 3D |

Puzzles |

Blocks |

Conic Section Fits Definition |

Ying-Yang |

Circles on Sphere |

Osculating Circle of Pedal Curves |

Geometric constructions associated with
the regular dodecahedron |

How to Turn a Cube into a Rhombic Dodecahedron ? |

Applications of the Internet Archive to
Dynamic Geometry
Internet Archive 對於動態幾何的應用 |

Various Forms of Steiner Porism and Poncelet Porism |

3D Poncelet Porism and Steiner Porism |

ATCM 2009 Dynamic Geometry Contest |

Circles in
Space |

Straightforward Constructions |

Steiner
Porism on the Sphere |

Patterns
on Solids |

An Ellipse
Sliding Along a Trochoid |

Deltoid Sliding Along an Ellipse
Deltoid Sliding Outside a Fixed Ellipse
Deltoid Sliding on Two Perpendicular Lines |

Planar
Objects in 3D |

Rotating
Polyhedra |

Project
Poster 2008 |

Project Poster 2009 |

Ruled
Surface |

Cap-Cup |

12 Parts
Decomposition |

Workshop Given at ATCM 2008:
Polyhedron A Projected into Polyhedron B |

Four Circles Tangent to Two Cicles at Four Points |

7-Circle Theorem |

Starting with Planar Objects |

Three
Perspective Objects |

Patterns
on Great Rhombicosidodecahedron |

Interpolations |

Three Circles |

Convex
Hull |

Catalan
Solid |

Patterns
on Small Rhombicosidodecahedron |

Different Ways to Construct the Nephroid |

Rotating
Rhombic Polyhedra |

Rhombic
Icosahedron |

Rhombic
Polyhedra |

Rhombic Hexecontahedron |

Famous
Curves and Their Tangents |

Concurrency |

Linkage in
Space |

Packing |

Exploring Geometric Models with Cabri 3D |

Irregular Motions |

Compound |

Dudeney's
Trick |

3D Linkage |

Reflection on Edges |

Three-Sphere Theorem |

Potpourri |

Conics from Given Conditions |

Parabola |

Exploring Dynamic Geometry
with Geometer's Sketchpad |

7 Dodecahedrons |

Created
When Version 2 Appeared |

Animation of Rhombic Polyhedra |

Reye's
Configuration |

Thesis - 2010 |