Rhombus
this post was submitted on 08 Sep 2026
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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/wiki/Integration_by_substitution#Substitution_for_multiple_variables
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?
I think there's 1 building in Dubai that looks like that?
I had to look up what that word means in German. It's Raute and that can also be this thing: #
Take a square. Lean it to the side. Rhombus. Take a diamond, let it fall on one of its sides. Rhombus. The world just keeps a-rhombusin, you just stopped a-noticin'
Jokes on you! We're currently in a rhomboid-shaped economy right now!
clearly you didn't learn, since diamonds are a pretty common shape
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.
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.
Come across any rhombus shaped amazon boxes yet?
I will punch some into the shape of one before shipment, just for you <3
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.
Haven't you guys used a kite before?
do de ca heedron
ILLUMINATI CONFIRMED!!1!one!!
The word "rhomboidal" exists and you are allowed to use it as much as you like
A rhombus sounds like a dance, lol
you're thinking of the rumba
Not to be confused with the shitty robot vacuum.
They were still around in 1996.
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
someone's never played q-bert or the sims
That's a plumbob
In my culture, rhombus is the basis of a vagina pictogram. In my culture, rhombus is every schoolboy's favorite shape.
https://commons.wikimedia.org/wiki/Category:Czech_vulva_symbols
Pičivo.jpg
That one was great 🤣
Rhombussy
Pica in brazilian Portuguese means dick.
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.
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.
<|>
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.
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
That's even better
This is the cave btw
Researchers believe that the entrance to the cave was a slit, which was then widened by humans.
😏
It is impossible to be mature about this.
Imagine my 14yr old mind seeing and reading about this for the first time
You weren't kidding they even got the cervix lol
A rhombus, otherwise known as a diamond. Its one of the more popular shapes past star, triangle, circle, and square.
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