(This is only a puzzle to fun! )
Tokoro.
All distances of the points to be Integer
- Make a circle with its center (0,0) and radius r.
- Make five points on the circle with all distances of the points to be integer.
- The puzzle is to find the minimum of r.
- Next, the same puzzle except the number of points are 10.
- The answer of 4 points attached.
![puzzle-4p.png puzzle-4p.png](https://community.ptc.com/t5/image/serverpage/image-id/13028i74A9947C9D353B68/image-size/large?v=v2&px=999)