This is amazing and thank you for sharing. The ability of the human race to come up with different yet universally understood yonic symbols is heartening. Like no matter what place or time, we're all in this together and we will be drawing genitalia.
So are they like extinct or something?
a month ago by Lady Butterfly she/her to c/memes
WhiteOakBayou 44 points a month ago
ThatWeirdGuy1001 10 points a month ago
Hell my dude there's a cave people deliberately carved to look like a vag and it's incredibly detailed.
Humans just seem to love genitals to an alarming but understandable degree
WhiteOakBayou 4 points a month ago
That's even better
ThatWeirdGuy1001 10 points a month ago
This is the cave btw
LePoisson 4 points a month ago
That's actually amazing I love that just a diamond with a line in the middle is shorthand for vagina, it's so universal too I bet if you showed that to any human they'd eventually guess the meaning.
measureyoucanpleasure 3 points a month ago
Traditionally you can also draw hair/rays around.
Western civilization seems obsessed with cocks, we need to draw more vulvas. I'm doing my part.
<|>
CleoMenezesJr 3 points a month ago
Pica in brazilian Portuguese means dick.
queerlilhayseed 67 points a month ago
Every square you ever met is a rhombus that gave up its art career and got a boring 9-5.
MoffKalast 64 points a month ago
All shapes will be hunted down to extinction until the one and only remains.
No_Money_Just_Change 24 points a month ago
Looked around my room
Stacks of books
Rectangular posters with rectangles on them
Windows, curtains, television
Then i saw the plaid shorts i am wearing and had a good laugh
MoffKalast 4 points a month ago
And then the ceiling and the walls and the floor and the door, and the light switch...
MoffKalast 11 points a month ago
- 🐝
MoffKalast 7 points a month ago
The only thing that's greater than humanity's obsession with rectangles, is computers' obsession with triangles.
LadyButterfly 13 points a month ago
grabs tinfoil hat
crater2150 2 points a month ago
If obsession with rectangles makes one human, my cats are definitely human too.
OwOarchist 92 points a month ago
I went up to Calculus I in college (along with some physics and engineering), and I've done a bit of amateur math outside of school ... but the concept of a rhombus was still used exactly zero times.
The engineers prefer triangles, the physicists prefer circles, and the pure mathematicians are usually dealing with weird shapes that don't even have names. Who uses the rhombus?
disorderly 37 points a month ago
Right there with you, I didn't use it in analytical geometry, calcs 1-3, diff eqs, or numerical methods. I don't think it would have shown up in my other math classes either. I'm pretty sure the rhombus is nothing more than a happy shape.
HeHoXa 3 points a month ago
What's numerical methods all about?
I mean I think I can intuit a little and could Google a lot, but hearing from someone who seemingly somewhat recently studied is a unique chance.
disorderly 15 points a month ago
As the other poster succinctly said, it's about iterative solving problems. What might not be obvious is where you want to use this.
Let's say you are holding onto a continuous, all-metal cooking pan's handle and you turn on the burner; at what second will it be too hot to hold? If we assume the pan is starting at 20 C and it'll be too hot for your leathery, lemmy-browsing hand at 100 C, then we at least have some basic bounds on the problem, but how do we think about the middle parts?
We could say that the burner is putting out about 5 kW of energy (or more simply, that the pan's bottom has a fixed input of 5 kW (a so-called boundary condition). With a basic equation translating energy input into temperature (factoring in specific heat), we at least know the temperature of the bottom of the pan at a given moment, but what about the top of the pan and, most importantly, the handle? The temperature in these places isn't climbing because they're getting licked by flames, but due to thermal conductivity away from the bottom.
Thermal conductivity is actually one of the simplest questions in partial differential equations (PDEs), and is addressed with the aptly named heat equation. In extremely casual terms, the heat equation (du/dt = L u) is saying that the heat at a given position is determined by its past heat plus the past heats of positions around it. Our job as mathematicians is to express our problem using a so-called weak form of the heat equation that makes it possible for an iterative solution.
We can solve weak form equations with a framework like the Finite Differences method (which is a little dated but easier to understand than other methods, and also still quite effective). This very basically means we'll create a fixed grid of points, then express the relationships between them with algebra.
Once we have our algebraic mesh and we are happy with all of our boundary conditions, we can start the simulation. We watch as the temperature immediately shoots up on the bottom of the pan (followed soon after by the top and edges), then as heat slowly transfers up the handle until it reaches 100 C at the end.
In doing these problems, we make as many simplifications as possible in the boundary conditions, because the equation's solution space is unfathomably large. Everything we can do to constrain it (easy heat source, exact physical parameters of our materials, etc) shrink the solution space closer to one that matches our actual problem.
As a final thought, lots of very bright people have spent entire careers designing heatsinks using numerical methods, so don't take my description of the heat equation as an easy problem to mean it's not a great line of inquiry, but rather that the field is really fucking hard. Anyone who does this stuff can, in fact, hold a 90 C pan handle because their tolerance for pain is astronomical.
SailorFuzz 12 points a month ago
This is true for most parallelograms and later polygons.
Daughter just went through parts of middle school that seemed to focus on things like rhombuses and trapezoids. The only thing I"m thinking, as an engineer, is when was the last time I gave af about any of those shapes? I would just reduce them to triangles and rectangles.
Trig skills are WAY more useful than knowing how to calculate specific polygon shapes..... I don't mean to say that middle schoolers should be learning trig... just that the time spent learning how to do specific shapes is a literal waste of time that they could be using to prepare for later things (like trig).
gibmiser 8 points a month ago
As someone in education i would bet money that since it is a vocabulary word with a simple definition in a subject that is hard to teach, it is included to make things easier on the teachers and students. Mind you easier isnt often a good thing, and in this case I'd say its lazy and irresponsible to focus on things that don't scaffold well or have much practical use
OwOarchist 4 points a month ago
Maybe it shows up in some of the dreaded standardized tests, and that's why they're sure to teach it?
agamemnonymous 10 points a month ago
A rhombus is just an equilateral parallelogram, and parallelograms are the easiest way to approach vector cross products. And you're 3/4 of the way there when you do tip-to-tail vector addition. They should have come up at least a couple times in geometry. Rhombi pop up as faces in lots of polyhedra, and tiles in lattices. I don't know much about crystallography, but I'm sure they make an appearance.
captainlezbian 3 points a month ago
Yeah and we engineers love parallelograms, but not as much as triangles.
ToastedRavioli 3 points a month ago
What is a rhombus but two triangles, my dear
flamingo_pinyata 19 points a month ago
They're not really mentioned in more advanced math. It's all polygons.
Ok, triangles are often treated as a special case. But for anything else it's a n-sided polygon.
AnnaFrankfurter 2 points a month ago
Nah in my experience everything is a circle. You see π even in places you don't expect
it_depends_man 1 point a month ago path: 0 25728702 25729368, hotness: undefined, score: 1, children: 0
some_kind_of_guy 8 points a month ago
ILLUMINATI CONFIRMED!!1!one!!
LadyButterfly 3 points a month ago
RIP
Imgonnatrythis 18 points a month ago
Isn't a rhombus just what you call a diamond that's having a bad day?
RhombusZILtoid1991 3 points a month ago
Delete this image now, or in 5 years, Elon Musk will release the Tesla Rhombus, and force it upon Europe!
mrgoosmoos 11 points a month ago
clearly you didn't learn, since diamonds are a pretty common shape
Mycatiskai 11 points a month ago
Every 3 ft square box that you shoved a bunch of 3.25 ft long irregularly shaped items into then closed the flaps on is a rhombus.
HocEnimVeni 9 points a month ago
Fun Fact, many door frames are in fact rhomboid or trapezoidal.
SuperNovaStar 4 points a month ago
A rectangle is not a rhombus unless it is a square
sin_free_for_00_days 2 points a month ago
LOL.
agamemnonymous 1 point a month ago
Oh man, I forgot about Crayon Physics
Funkt4st1c 9 points a month ago
A rhombus, otherwise known as a diamond. Its one of the more popular shapes past star, triangle, circle, and square.
OrteilGenou 1 point a month ago
Hendecagon is the only one that is also a good source of protein though
pewgar_seemsimandroid 3 points a month ago
Happy cake day!
MajorasTerribleFate 2 points a month ago
Fun word for you, the up-down-left-right set of directions can be referred to as "orthogonal" - think "orthodox".
MutantTailThing 7 points a month ago
Wasn’t she that actress from that 2008 movie Doomsday?
Widdershins 4 points a month ago
No, you're thinking of Danny DeVito's wife. They have separated but are still married.
notthebees 7 points a month ago
OOP needs to eat baklava
GreenKnight23 -1 points a month ago
isn't that one of those mask things fascists use?
DragonTypeWyvern 2 points a month ago
No, and the word is too Eastern European to keep a meme chain going in English if that's what you're going for
notthebees 1 point a month ago
Baklava, balaclava, ballache, idk how far you'd take this afterwards
lichtmetzger 7 points a month ago
When I played "Psychonauts: In the Rhombus of Ruin" I got reminded again that this thing actually exists.
AlteredEgo 6 points a month ago
Imagine living as a farmer in medieval Europe near a small village and you make MOST of your shit yourself or with help from the local blacksmith. You'd use all kinds of things and ideas that we don't use any more. You need to be creative to solve your daily problems and find ways to do stuff efficiently. Like imagine you'd need to dig out a bit of earth for an "almost square" and need to calculate the area and volume of earth you'll have to move.
I'm not sure what I'm trying to say, but I think modern education is wasted on the modern human.
Jankatarch 6 points a month ago
We are not curious enough. Dopamine hit of figuring out a cool thing requires lots of time, meanwhle videogames and movies are guaranteed in short term.
We are not to blame tho, time to spend bored is simply not something we have; every other moment of our life will be either at work, preparing to go work, or driving to work, afterall.
I predict the farmer dug that square on snow instead of dirt. They certainly weren't farming during mid-winter. Must be boring. I will still be labeling amazon boxes this december.
AlteredEgo 5 points a month ago
Come across any rhombus shaped amazon boxes yet?
Jankatarch 4 points a month ago
I will bend some into the shape of one before shipment, just for you <3
CrimeIsLegalNow 4 points a month ago
The point of the modern grade school education is to give any and every student enough of a education in any given topic to specialize in any field afterwards, depending on interest and opportunities, as well as create voting citizens that can understand at least the basics of any given social debate.
Modern education isn't wasted. Some people just waste it afterwards.
And some people who want to destroy it to keep everyone as ignorant as your medieval peasants pretend that they don't understand any of that.
Also smiths would literally just do that on vibes lmao.
gandalf_der_13te 6 points a month ago
oh they don't appear again, but its generalization, the parallelepiped, does:
it's used to calculate volumes of curved objects. basically you chop down the object into a lot of small parallelepipeds (mentally), and then calculate the volume of each of them small things and sum over them. Done.
to calculate the volume of a parallelepipede, there's a surprisingly simple mathematical formula. If you have the vectors for the three sides a, b, c, then the volume V = (a × b) · c, where × is the cross product and · is the dot product. it's very simple and an effective way to calculate volumes of curved / deformed objects.
Links:
- (german) https://de.wikipedia.org/wiki/Transformationssatz
- (english) https://en.wikipedia.org/...
noxypaws 2 points a month ago
where × is the cross product and · is the dot product
pardon my ignorance but what the fuck is a "cross product" or a "dot product"? I assumed at first this was multiplication, but then I saw the dot and realized this isn't anything I've ever been taught
gandalf_der_13te 2 points a month ago
https://en.wikipedia.org/wiki/Cross_product
https://en.wikipedia.org/wiki/Dot_product
sorry i am too tired to explain in full detail rn
gandalf_der_13te 2 points a month ago
yeah it's "surprisingly simple" in the sense that there's a well-defined algorithm to do it. a computer can do it easily, with very little time/effort. anyways, you don't need to think about every problem specifically. "now i got this parallelepiped, how do i calculate the volume?" you can just use the same formula every time.
tetris11 1 point a month ago
it’s used to calculate volumes of curved objects. basically you chop down the object into a lot of small parallelepipeds (mentally), and then calculate the volume of each of them small things and sum over them. Done.
For anyone not quite getting this (like me), to calculate the area under a curve in 2D we were taught to cut it into tiny thin rectangles and sum those up; intergration when those rectangles have a width tending to 0.
For 3D (e.g. a pond ripple) or higher curves, a simple rectangle wont cut it as the length of the rectangle might only get the top of a wave, but not capture the crest of it tangential to it. So you create slopey rectangles to approximate that space, and bring the limit to zero to get the area (I think).
My only confusion now is, if I'm deforming a rectangle from one side to approximate the curve just above it, am I not also deforming the bottom of that rectangle in the same way (for the parralel strcture to hold true), and creating a forgotten space just above the axis plane?
gandalf_der_13te 2 points a month ago
well, almost. it's a bit different than that.
what you mean is this:
you approximate an integral with a lot of small thin rectangles, but if the curve's not entirely rectangular, there's gonna be some error, which becomes smaller as the rectangles become smaller. this can be ignored if the rectangles are thin enough. and it's not what i meant.
what i meant is something like this:
you take a piece of elastic fabric, and paint some squares on it. now, if you stretch the fabric, the squares change shape, they become approximately parallelepipeds. this is a good approximation. now, if we want to calculate the total area of that fabric (after stretching), we can calculate the area of each of the small parallelepipeds (which is easy to do with the formula in above comment) and then sum them.
davetortoise 6 points a month ago
The word "rhomboidal" exists and you are allowed to use it as much as you like
Brickhead92 1 point a month ago
A square is also a rectangle.
Jackcooper 5 points a month ago
Yes! Even a rhombus!! https://comb.io/Sks1NZ
captainlezbian 2 points a month ago
Oh love quadrangles are the worst
MintyFresh 4 points a month ago
Rhombus deez nuts
CannonFodder 4 points a month ago
We learn to learn how to learn.
f4f4f4f4f4f4f4f4 3 points a month ago
They were still around in 1996.
Nautalax 3 points a month ago
There is an evil invasive plant called Sida rhombifolia that invades local habitats and is obnoxious to pull over here. Guess what shape the leaves are
edit: Acalypha rhomboidea is on the side of justice here though
DudeImMacGyver 3 points a month ago
Rhombusted!
MidsizedSedan 2 points a month ago
I think there's 1 building in Dubai that looks like that?
heartSagan5 2 points a month ago
A rhombus sounds like a dance, lol
twitchingbits 2 points a month ago
you're thinking of the rumba
MrsDoyle 2 points a month ago
Rhombus escape. More efficient than a porter escape.
pewgar_seemsimandroid 1 point a month ago
someone doesn't watch jacksucksatlife and jacksucksatstuff
BlindPenguin 1 point a month ago
I had to look up what that word means in German. It's Raute and that can also be this thing: #
ijustliketrains 1 point a month ago
So much stuff in this thread that sounds like it could be out of Flatland
memes
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memes
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Post memes here.
A meme is an idea, behavior, or style that spreads by means of imitation from person to person within a culture and often carries symbolic meaning representing a particular phenomenon or theme.
An Internet meme or meme, is a cultural item that is spread via the Internet, often through social media platforms. The name is by the concept of memes proposed by Richard Dawkins in 1972. Internet memes can take various forms, such as images, videos, GIFs, and various other viral sensations.
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Laittakaa meemejä tänne.
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- Ei selkeän poliittista sisältöä (poliitikoista, poliittisista tapahtumista, vaaleista jne) parempi paikka esim. !politicalmemes@lemmy.ca
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In my culture, rhombus is the basis of a vagina pictogram. In my culture, rhombus is every schoolboy's favorite shape.
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