this post was submitted on 08 Jun 2025
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submitted 1 day ago by weird@sub.wetshaving.social to c/memes@lemmy.world
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[–] halcyoncmdr@lemmy.world 121 points 1 day ago* (last edited 1 day ago) (1 children)

Someone never had to deal with mathematical proofs, only layman's definitions.

All properties of a parallelogram apply:

  • Opposite sides are parallel
  • Opposite sides are congruent
  • Opposite angles are congruent
  • Consecutive angles are supplementary
  • Diagonals bisect each other

AND

  • All angles are congruent
  • All sides are congruent
  • Diagonals are congruent
  • Diagonals are perpendicular
  • Diagonals bisect opposite angles
[–] Eatspancakes84@lemmy.world 12 points 23 hours ago

Of course, but such strict definitions only come about because smart people come up with examples like OP when you don’t add the full definition.