Restoring a circle from an array of points of its part?

Question

C++ / C#

Suggest an algorithm for restoring a circle from an array of points on its part. To determine the center of this circle and the radius.

Answer 1

Take three points, preferably away from each other. They form two chords. Draw perpendicular bisectors to these chords. Their intersection is the center.
If you have a spread, then repeat with multiple sets of points.

Answer 2

Looks like a linear regression problem
https://numerics.mathdotnet.com/Regression.html