Compute all 6 pairwise distances: d(p1,p2), d(p1,p3), d(p1,p4), d(p2,p3), d(p2,p4), d(p3,p4) Store distances in a set to find unique values If any distance is 0, return false (duplicate points) If there are exactly 2 unique distances, check counts: - Smaller distance appears 4 times (sides) - Larger distance appears 2 times (diagonals) If both conditions hold, return true Otherwise, return false
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$ curl repovive.com/roadmaps/math-fundamentals/geometry-basics/valid-square-algorithm
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