this post was submitted on 08 Jun 2025
899 points (92.0% liked)

memes

15599 readers
2466 users here now

Community rules

1. Be civilNo trolling, bigotry or other insulting / annoying behaviour

2. No politicsThis is non-politics community. For political memes please go to [email protected]

3. No recent repostsCheck for reposts when posting a meme, you can only repost after 1 month

4. No botsNo bots without the express approval of the mods or the admins

5. No Spam/AdsNo advertisements or spam. This is an instance rule and the only way to live.

A collection of some classic Lemmy memes for your enjoyment

Sister communities

founded 2 years ago
MODERATORS
 
top 50 comments
sorted by: hot top controversial new old
[–] [email protected] 3 points 6 days ago

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

[–] [email protected] 2 points 6 days ago

Okay, calm down Diogenes

[–] [email protected] 1 points 6 days ago* (last edited 6 days 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.

[–] [email protected] 164 points 1 week ago (8 children)

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

[–] [email protected] 54 points 1 week ago* (last edited 1 week ago) (2 children)

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

[–] [email protected] 36 points 1 week ago

straight, gay, lines are lines. let them be.

[–] [email protected] 13 points 1 week ago (1 children)

If that's so, the angles are probably not right angles.

[–] [email protected] 10 points 1 week ago

None of the angles looks wrong either

load more comments (7 replies)
[–] [email protected] 122 points 1 week ago* (last edited 1 week 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
[–] [email protected] 13 points 1 week 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.

[–] [email protected] 85 points 1 week ago (1 children)

The interior angles need to be equal 🤓

load more comments (1 replies)
[–] [email protected] 54 points 1 week ago (6 children)

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

[–] [email protected] 36 points 1 week 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.

[–] [email protected] 16 points 1 week ago

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

[–] [email protected] 21 points 1 week ago (1 children)

Its wrong though so the joke falls flat

[–] [email protected] 8 points 1 week ago (1 children)

Didn't realize jokes have to be literally correct

load more comments (1 replies)
[–] [email protected] 17 points 1 week ago (23 children)

We do understand it's a meme and a joke. Just not a very good one, because one can easily poke holes into it.

load more comments (23 replies)
[–] outhouseperilous 10 points 1 week ago

Or the fun part.

[–] [email protected] 8 points 1 week ago

You're having fun wrong!!1one

load more comments (1 replies)
[–] [email protected] 46 points 1 week ago (8 children)

Oh let's get pedantic!

The curved edges technically have infinite "side".

[–] [email protected] 27 points 1 week ago (10 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.

load more comments (10 replies)
[–] [email protected] 11 points 1 week ago (3 children)

Not if this square is a projection of a curved surface

load more comments (3 replies)
load more comments (6 replies)
[–] [email protected] 39 points 1 week ago (6 children)

A square must also have two pairs of parallel sides.

load more comments (6 replies)
[–] [email protected] 34 points 1 week ago* (last edited 1 week ago)

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

[–] [email protected] 33 points 1 week ago (1 children)

If it clucks likes a chicken and scratches like a chicken, it's Man.

[–] [email protected] 13 points 1 week ago (1 children)

I got that reference!Behold, a featherless biped!

[–] [email protected] 10 points 1 week ago

And for those who don't: Plato, a Greek philosopher, was putatively asked by a student while teaching at the Academy what the definition of a man (human) was. Plato responded that a man is a "featherless biped".

Diogenes, another Greek philosopher and infamous quick-wit, caught wind of this and thought that was the dumbest thing ever, so he gate-crashed one of Plato's lectures and pulled out a chicken which had all of its feathers plucked out and said "Behold, a man!".

[–] [email protected] 30 points 1 week ago (8 children)

I get downvoted for bringing it up, but for fuck's sake you're dumping literally everything into this community regardless of the fit. There are a dozen (I'm estimating) other communities that could benefit from the content you post but you have thus far insisted on only posting here.

Can you at least make the tiniest effort to spread content to other communities that would benefit from the increased views and potential subscriptions?

I shall await the fun police and everything's a meme comments.

[–] [email protected] 20 points 1 week ago

At least it's better than endless American politics.

load more comments (7 replies)
[–] [email protected] 21 points 1 week ago (5 children)

Rotate the cone towards you.

Now you see this. 🤯

load more comments (5 replies)
[–] [email protected] 21 points 1 week ago* (last edited 1 week ago)
[–] [email protected] 20 points 1 week ago (2 children)

Learned this one in 6th grade geometry: drawing a square in thr corner doesn't make it 90°

[–] [email protected] 12 points 1 week ago

But these are all right angles, as long as the two arcs are centered on the same point as the intersection of the two straight lines.

load more comments (1 replies)
[–] [email protected] 19 points 1 week 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.

[–] [email protected] 16 points 1 week ago* (last edited 1 week 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]

load more comments (8 replies)
[–] [email protected] 16 points 1 week ago (7 children)

Solution:

Explanation:

  1. in order for the straight lines to be 90 deg with the circles, they must be radii of circles with same central point

  2. the length of an arc is defined as c = r * θ (where r is the radius, and θ is the angle)

  3. we define the inner circle with radius r₁ and its arc L₁ = r₁ * θ₁

  4. we define the outer circle with radius r₂ and its arc L₂ = r₂ * θ₂

  5. Because of (1), θ₁ + θ₂ = 2π

  6. To create the shape, L₁ = L₂ = r₂ - r₁

If you start replacing and solving, you will get a 2nd grade quadratic, which has a positive and a negative solution. The positive solution is that magic number.

load more comments (7 replies)
[–] [email protected] 15 points 1 week ago

Dammit Diogenes, this is why we don't allow you in the geometry class anymore.

[–] [email protected] 9 points 1 week ago

Thanks, I hate it.

[–] [email protected] 9 points 1 week ago

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

[–] [email protected] 9 points 1 week ago

Diogenes go home.

[–] [email protected] 8 points 1 week ago

Not a polygon

load more comments
view more: next ›