Determine the radius of a sphere provided four non-coplanar points on the surface of the sphere.

 pts = [x1 y1 z1;
        x2 y2 z2;
        x3 y3 z3;
        x4 y4 z4]

Hint: See http://steve.hollasch.net/cgindex/geometry/sphere4pts.html

Example:

 pts = [1 0 0;
        0 1 0;
        0 0 1;
       -1 0 0]
 r=1
Solve

Solution Stats

1122 Solutions

254 Solvers

Last Solution submitted on Mar 13, 2026

Last 200 Solutions

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers254

Umar Gavin Hoang Minh Tri Lorenzo

Suggested Problems

More from this Author306

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!