this post was submitted on 08 Jun 2025
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A collection of some classic Lemmy memes for your enjoyment

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[–] LovableSidekick@lemmy.world 1 points 4 hours ago* (last edited 3 hours ago)

Lines that intersect a circle like that aren't "right angles" tho, they're called "normal" to the circle - in other words pointing directly toward the center. A normal line is at right angles to a tangent line, but not to a curve.

[–] A_Random_Idiot@lemmy.world 2 points 5 hours ago

Okay, calm down Diogenes

[–] Saarth@lemmy.world 1 points 4 hours ago

Don't the internal angles need to be 90°? Two of those right angles aren't right angles on the inside.

[–] PeriodicallyPedantic@lemmy.ca 19 points 19 hours ago

I'm not a math major, but I always considered it that a square is a special case of rectangle, a rectangle is a special case of parallelogram, and a parallelogram a special case of a quadrilateral, a quadrilateral a special case of a simple polygon.

This shape isn't a polygon, so it cannot be a square.

[–] BuboScandiacus@mander.xyz 8 points 18 hours ago

Not a polygon

[–] hikaru755@lemmy.world 21 points 1 day ago* (last edited 1 day ago)
[–] YiddishMcSquidish@lemmy.today 47 points 1 day ago (3 children)

Oh let's get pedantic!

The curved edges technically have infinite "side".

[–] PeriodicallyPedantic@lemmy.ca 7 points 19 hours ago (1 children)

Hey, that's my job!

Also I don't think that's technically the technical classification. I think that sidedness is an attribute that simply doesnt apply to curves.
You can approximate curves with some number of sides, and the approximation gets more accurate as the number approaches infinity, but it doesn't actually have the infinite sides.

[–] YiddishMcSquidish@lemmy.today 1 points 19 hours ago (1 children)

Very cool! I'm always happy to learn something new!

[–] PeriodicallyPedantic@lemmy.ca 2 points 13 hours ago* (last edited 13 hours ago) (1 children)

I mean, I'm just pedantic; double check with a mathematician, to be sure lol

[–] YiddishMcSquidish@lemmy.today 1 points 12 hours ago (1 children)

I'm genuinely curious, what is your job that requires arithmetic?

[–] PeriodicallyPedantic@lemmy.ca 2 points 12 hours ago (1 children)

I feel like most jobs require arithmetic.
But it is not my career to be a pedant, just my role in life 😜

[–] hansolo@lemmy.today 27 points 1 day ago (8 children)

....and a square has four interior 90 degree angles.

...and based on the infinite number of sides for a curved line aspect, the "90 degree" angles would all be +/- the limit as it approaches zero, so never truly 90 degrees but always an infinite fraction away.

[–] jwmgregory@lemmy.dbzer0.com 2 points 21 hours ago

the angles are interior if you go into the scary world of high level maths and their weird fucking geometries.

this is a square, from a certain point of view

[–] YiddishMcSquidish@lemmy.today 5 points 1 day ago (1 children)

Someone knows more calculus than they are letting on...

[–] hansolo@lemmy.today 4 points 1 day ago (1 children)

Hey, I failed the highest level of calculus possible. Twice.

[–] YiddishMcSquidish@lemmy.today 2 points 19 hours ago

I'll have you know that I passed the two lowest levels of calculus required for my degree. So you know, I'm something of an expert.

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[–] danhab99@programming.dev 11 points 1 day ago (4 children)

Not if this square is a projection of a curved surface

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[–] Quadhammer@lemmy.world 21 points 1 day ago (1 children)

Rotate the cone towards you.

Now you see this. 🤯

[–] tetris11@feddit.uk 2 points 13 hours ago (1 children)

uhhh, wait. Under what projection is OP's "square" reduced to an actual square

[–] Machinist@lemmy.world 3 points 13 hours ago (1 children)

It's possible, but there needs to be a thickness in addition to the length and width.

[–] tetris11@feddit.uk 1 points 6 hours ago

Im gonna need more than that as an explanation. Sandwiches too if you're making some

[–] joel_feila@lemmy.world 84 points 1 day ago (1 children)

The interior angles need to be equal 🤓

[–] FUsername@feddit.org 1 points 19 hours ago

Here you can see how things go haywire when skipping minor parts of definitions.

[–] taxiiiii@lemmy.world 9 points 1 day ago

Diogenes go home.

[–] throwawayacc0430@sh.itjust.works 15 points 1 day ago* (last edited 1 day ago) (8 children)

Wrong. This is a definition of a [pizza] + [the extra peperoni from the other slices that got stuck to that slice because the cutting was imperfect]

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[–] TheLeadenSea@sh.itjust.works 159 points 2 days ago (8 children)

Straight lines. Also two sets of parallel lines. This is one definition of a square, but not the common one.

[–] mcqtom@lemmy.world 54 points 2 days ago* (last edited 2 days ago) (3 children)

I believe these lines are straight with a black hole at the centre.

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[–] burgersc12@mander.xyz 54 points 1 day ago (29 children)

Does no one understand this is a joke, talking about parallel lines and mathematical proofs is pointless when its a fucking meme

[–] dontbelievethis@sh.itjust.works 35 points 1 day ago (1 children)

It's not pointless because you can laugh about a joke and then learn something about math.

They don't cancel each other out. They can be at the same place and still work on their own.

[–] weird@sub.wetshaving.social 16 points 1 day ago

I love memes that are funny on their own, but also provide discussion material.

Or the fun part.

[–] the_trash_man@lemmy.world 21 points 1 day ago (2 children)

Its wrong though so the joke falls flat

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[–] halcyoncmdr@lemmy.world 121 points 2 days ago* (last edited 2 days 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
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[–] Kolanaki@pawb.social 6 points 1 day ago (1 children)
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[–] umbrella@lemmy.ml 34 points 1 day ago* (last edited 1 day ago)

ITT: math people going "listen here you little shit"

[–] Pulptastic@midwest.social 39 points 1 day ago (6 children)

A square must also have two pairs of parallel sides.

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[–] JackFrostNCola@aussie.zone 9 points 1 day ago

Tut tut, all these maths books promoting unhealthy square shapes, real squares have curves.

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