5 ms·

> If you allow zero width/height, you can also have 7777, 7887, 7997, 7447 and 7117. Why not 7227, 7337, 7557, 7667 too? The theorem holds for these as well.

• gamerDude 2y ago
  I assume it has to do with them being rectangular. And while technically you could have a rectangle that is rotated, I think it's also plausible to assume that any diagonals are considered as rhombuses (rhombi?)
  • Someone 2y ago
    I would call 2486 and 2684 a square and, hence, a rectangle. I think the theorem holds for all 8 variants of that.
    • feoren 2y ago
      2486 is only a square/rectangle if the keys are exactly square. They're certainly not in the example image shown.
• gus_massa 2y ago
  Also 7007.