Soddy Points

Given three mutually tangent Circles, there exist exactly two nonintersecting CirclesTangent to all three Circles. These are called the inner and outer Soddy Circles, andtheir centers are called the inner and outer Soddy points. The outer Soddy circle is the solution to the FourCoins Problem. The center of the inner Soddy circle is the Equal Detour Point, and the center of the outerSoddy circle is the Isoperimetric Point (Kimberling 1994).

References

Kimberling, C. ``Central Points and Central Lines in the Plane of a Triangle.'' Math. Mag. 67, p. 181, 1994.

• Burkhardt Quartic
• Burnside Problem
• Burnside's Conjecture
• Burnside's Lemma
• Busemann-Petty Problem
• Busy Beaver
• Small Multiple Method
• Small Number
• Small Retrosnub Icosicosidodecahedron
• Small Rhombicosidodecahedron
• Small Rhombicuboctahedron
• Small Rhombidodecacron
• Small Rhombidodecahedron
• Small Rhombihexacron
• Small Rhombihexahedron
• Small Snub Icosicosidodecahedron
• Small Stellapentakis Dodecahedron
• Small Stellated Dodecahedron
• Small Stellated Triacontahedron
• Small Stellated Truncated Dodecahedron
• Small Triakis Octahedron
• Small Triambic Icosahedron
• Small World Problem
• Smarandache Ceil Function
• Smarandache Constants