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 120 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 11 points 1 day 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.