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Only Isosceles (Posted on 2005-02-13) Difficulty: 3 of 5
Arrange 8 points in 3-space so that for each of the 56 triples of points that they determine, at least two of the three distances between points in the triple are equal.

See The Solution Submitted by David Shin    
Rating: 4.5000 (4 votes)

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Great problem Comment 6 of 6 |
Once a pentagon is tried, the solution becomes apparent.
  Posted by Charley on 2005-05-12 16:56:46
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