How to get the difference in GPS coordinates knowing the center and radius?

Question

Geometry

How can I get the difference in GPS coordinates between the center and a point lying on a circle, given the coordinates of the center and the radius of the circle
upd. The difference in coordinates is needed modulo, you can take any point, for example, lying at 0 °

Answer 1

If by "difference" you mean distance, then it is equal to the radius of the circle.