Johnson Circles: Geometry, Circle, Radius, Anticomplementary Circle

Villarceau Circles: Geometry, Circle, Torus, Perpendicular, Astronomer, Yvon

Great circle Distance: Distance, Point (geometry), Sphere, Spherical geometry, Euclidean space, Non...

Woo Circles: Geometry, Infinity, Archimedean Circle, Arbelos, Semicircle, Tangent

Circle of Antisimilitude: Geometry, Circle, Inversive Congruence (geometry)