Circles in Space


Inversion of Circles Inscribed in Faces of Cuboctahedron

Inversion of Circles Inscribed in Faces of Cuboctahedron

Inversion of Circles Inscribed in Faces of Pentagonal Cupola

Inversion of Circles Inscribed in Faces of Square Cupola


Inversion of Circles Inscribed on Faces of Dodecahedron


Poncelet Porism for Escribed-Inscribed Quadrilaterals


Poncelet Porism for Quadrilaterals

Sphere Inversion


Steiner Porism on Sphere