• Find the plane containing the 2 spheres with linearization of distance constraints (by subtraction)

    𝐴𝑀2=𝐵𝑀2(𝑀−𝐴)2=(𝑀−𝐵)2(𝐵−𝐴)⋅𝑀=𝐵2−𝐴22
  • Find radius using pythagoras

References