1971 IMO Problems/Problem 5
Prove that for every natural number m; there exists a finite set S of points in a plane with the following property: For every point A in S; there are exactly m points in S which are at unit distance from A.
Prove that for every natural number m; there exists a finite set S of points in a plane with the following property: For every point A in S; there are exactly m points in S which are at unit distance from A.
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