top 50 comments

sorted by: hot top controversial new old
[–] 95 points 4 weeks ago* (last edited 4 weeks ago) (13 children)

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

  • source
  • hideshow 13 child comments
  • [–] 43 points 4 weeks ago (7 children)

    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.

  • source
  • parent
  • hideshow 7 child comments
  • load more comments (5 replies)

    Every square you ever met is a rhombus that gave up its art career and got a boring 9-5.

  • source
  • [–] 65 points 4 weeks ago (9 children)

    All shapes will be hunted down to extinction until the one and only remains.

  • source
  • hideshow 9 child comments
  • load more comments (1 reply)
    [–] 48 points 4 weeks ago (19 children)

    This person hasn't done math past elementary.

  • source
  • hideshow 19 child comments
  • [–] 94 points 4 weeks ago* (13 children)

    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?

  • source
  • parent
  • hideshow 13 child comments
  • [–] 11 points 4 weeks ago* (last edited 4 weeks ago) (2 children)

    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).

  • source
  • parent
  • hideshow 2 child comments
  • [–] 7 points 4 weeks ago (1 child)

    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

  • source
  • parent
  • hideshow 1 child comment
  • load more comments (1 reply)
  • [–] 10 points 4 weeks ago* (last edited 4 weeks ago) (2 children)

    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.

  • source
  • parent
  • hideshow 2 child comments
  • load more comments (2 replies)
  • load more comments (1 reply)
  • load more comments (2 replies)
    [–] 28 points 4 weeks ago* (last edited 4 weeks ago) (4 children)
    load more comments (4 replies)
    [–] 23 points 4 weeks ago (1 child)
  • [–] 19 points 4 weeks ago

    Isn't a rhombus just what you call a diamond that's having a bad day?

  • source
  • [–] 18 points 4 weeks ago (1 child)

    Don't forget the poor trapezoid.

  • source
  • hideshow 1 child comment
  • load more comments (1 reply)
    [–] 16 points 4 weeks ago

    If I ever have my own home, my house will have a rhombus room.

    "Don't you mean a rumpus room?"

    Bro, that's not even a real shape.

  • source
  • [–] 15 points 4 weeks ago

    Some pretty rhombus logic if you ask me

  • source
  • [–] 12 points 4 weeks ago (3 children)
    load more comments (3 replies)
    [–] 12 points 4 weeks ago

    clearly you didn't learn, since diamonds are a pretty common shape

  • source
  • [–] 11 points 4 weeks ago

    Haven't you guys used a kite before?

  • source
  • [–] 11 points 4 weeks 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.

  • source
  • [–] 9 points 4 weeks ago (1 child)
    load more comments (1 reply)
    [–] 9 points 4 weeks ago

    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'

  • source
  • [–] 9 points 4 weeks ago (3 children)

    A rhombus, otherwise known as a diamond. Its one of the more popular shapes past star, triangle, circle, and square.

  • source
  • hideshow 3 child comments
  • [–] 9 points 4 weeks ago (4 children)

    Fun Fact, many door frames are in fact rhomboid or trapezoidal.

  • source
  • hideshow 4 child comments
  • load more comments (4 replies)
    [–] 8 points 4 weeks ago

    do de ca heedron

  • source
  • [–] 8 points 4 weeks ago (3 children)

    I changed my excel cells to be rhombuses

  • source
  • hideshow 3 child comments
  • load more comments (3 replies)
    [–] 7 points 4 weeks ago

    When I played "Psychonauts: In the Rhombus of Ruin" I got reminded again that this thing actually exists.

  • source
  • [–] 7 points 4 weeks ago (1 child)

    Wasn’t she that actress from that 2008 movie Doomsday?

  • source
  • hideshow 1 child comment
  • load more comments (1 reply)
    [–] 7 points 4 weeks ago (3 children)
    load more comments (3 replies)
    [–] 7 points 4 weeks ago* (8 children)

    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:

  • source
  • hideshow 8 child comments
  • load more comments (8 replies)
    [–] 6 points 4 weeks ago

    Rhombuses are really commonly used in trigonometry puzzles. You know, "Here's a bunch of lines and a couple of angles, find the angle at X."

  • source
  • [–] 6 points 4 weeks ago

    It's also called diamond or zoomie square. You know, cuz it's like a square that's going so fast the pointy parts start at the tippy top

  • source
  • [–] 6 points 4 weeks ago

    You know what they say, all busses go to Rhome

  • source
  • [–] 6 points 4 weeks ago* (last edited 4 weeks ago)

    The word "rhomboidal" exists and you are allowed to use it as much as you like

  • source
  • load more comments
    view more: next ›