Y by
In the plane there are
points, some of which are black and the rest are green. For every black point, the following applies: There are exactly two green points that represent the distance
from that black point.
Find the smallest possible number of green dots.
(Walther Janous)


Find the smallest possible number of green dots.
(Walther Janous)
This post has been edited 1 time. Last edited by parmenides51, Nov 22, 2020, 10:33 PM