Orthogonal Spheres
Two spheres with centres $$C_1,C_2$$ and radii $$r_1,r_2$$ intersect orthogonally if:
$$C_1C_2^2=r_1^2+r_2^2$$
Terminology
- Orthogonal spheres: Spheres whose surfaces intersect at right angles.
Usage
- Used to test orthogonal intersection of two spheres.