3D

Sierpinski Tetrahedron

Projection Onto A Sphere

Regular Tetrahedron from Four Planes

Regular Tetrahedron from Four Planes (Linear Algebra)

Inversion Through Stereographic Projection

Soddy's Hexlet

Rolling Spheres

Shadow of a Sphere

The Pavillet Tetrahedron

The Pavillet Tetrahedron, Gergonne Line, and Soddy Line

Folding a Triangle

3D to 2D projection

3D to 2D projection (spherical coordinates)

Spirals on a Torus

The Structure of Soddy's Hexlet

Chebyshev Polynomials

Five Tetrahedra in a Dodecahedron

Five Cubes in a Dodecahedron

Dodecahedron by Strips 1

Dodecahedron by Strips 2

Polypolyhedron 1

Polypolyhedron 2

Polypolyhedron 3

Polypolyhedron 22

Dodecahedron

Icosahedron

Truncated Icosahedron

Rhombicuboctahedron

Cuboctahedron

Icosidodecahedron

Four Triangles in an Icosahedron

Octahedron

Icosahedron in Octahedron

Ten Hexagons in an Icosidodecahedron

Five Octahedra in an Icosidodecahedron

12 Pentagons in a Truncated Icosahedron

20 Triangles in a Truncated Icosahedron

Truncated Tetrahedron

Truncated Cube

Truncated Octahedron

Truncated Cuboctahedron

Truncated Dodecahedron

Rhombicosidodecahedron

Truncated Icosidodecahedron

The Isodynamic Points in 3D