930234  廖緯勝

Cone, Sphere, Cylinder

Three Squares

Cube Octahedron Compound

Dodecahedron Icosahedron Compound

Great Dodecahedron

Stella Octangula

Eight Circles of the Same Size Each Tangent to the Other Three

Pentagonal Cupola

Pentagonal Rotunda

Pentagrammic Antiprism

Square Cupola

Pentagonal Gyrobicupola

Pentagonal Orthocupolarotunda

Augmented Dodecahedron

Augmented Pentagonal Prism

Biaugmented Pentagonal Prism

Metabiaugmented Dodecahedron

Five Tetrahedra in a Dodecahedron

Intersections of lines of the same color are symmetrical with respect to a midpoint on the sphere

isogonal lines concur on a sphere

Lines of the same color are symmetrical with respect to the ex-center on the sphere

Common Intersection of Polar Planes

Polar Plane of a Point with respect to a Tetrahedron

12 Circles Meeting at 12 Points

20 Tetrahedra

Space Curve Projected into Parabolas and Circle

Center of a Circle Under Stereographic Projection

Circle Tangent to a given Circle Passing Through a Given Point

Theorem of a Chain of Four Tangential Circles

Roberts' Theorem

Sphere Inscribed in a Tetrahedron

Triaugmented Dodecahedron

Parabiaugmented Dodecahedron

Four Mutually Tangent Disks

Is it a Regular Polygon?

Tangents from a Point to a Circle on Sphere

Triangles Generated by Edges and Center

Circumscriptible Tetrahedron

Elongated Square Cupola

Four Angles Subtended by Opposite Edges at the Point of Contact of the Face with Inscribed Sphere

Monge Point and Monge Planes　

Steiner's Theorem

Variation based on Pentagonal Cupola

Variation based on Pentagonal Gyrocupolarotunda

Variation based on Square Antiprism

Variation based on Square Cupola