Geometric Construction

940234   陳是宇

 


 

Any Two Circles on a Sphere are Perspective

 


 

Center of a Circle Under Stereographic Projection-1


 

 

Center of a Circle Under Stereographic Projection-2

 


 

Constructing Dodecahedron from Icosahedron


 

 

Construction of a Rhombic Dodecahedron from a Cube


 

 

Construction of a Triangular Cupola starting with a triangle


 

 

Cube and Octahedron


 

 

Equilateral Triangle Torus


 

 

Five Octahedra in an Icosidodecahedron


 

 

Hyperbolic Paraboloid


 

 

Icosidodecahedron


 

 

Octagonal post


 

 

Octahedra3-compound


 

 

Octahedra4-compound

 


 

Pentagonal Cupola


 

 

Pentagrammic Antiprism


 

 

Square Gyrobicupola as Convex Hull of Six Squares


 

 

Tetrahedron 5-Compound

 


 

Triangular Gyrobicupola as Convex Hull of Tetrahedra

 


Truncated Octahedron from a Cube

 


Truncated Tetrahedron as Convex Hull

 


Villarceaux Circle

 


切線繞曲線的trace

 


正方形與正三角形

 


正方體的旋轉

 


球體上的兩個圓