What are some 2D objects that exists in our 3D world?

[Elprede]

If I can find answers to this question, I will automatically get an A in Physics for the semester.

 

[Dr Super Good]

Define "object"...

One could say that the ideas printed on paper are 2D and do exist although the paper that is used to present the idea is 3D.

Like wise a similar idea exists with digital media. Where the information presented is in 2D form but the actual object holding it is still 3D.

 

[BlargHonk]

There is nothing in this dimension that has zero thickness. The thinnest you can possibly get with matter is roughly one angstrom.

 

[Winimasker]

3D objects are made up of 2D surfaces. That might be the only reason why 2D objects are existed. (my opinion)

3D objects will not be existed without 2D surfaces. To make a cube, we need 6 surfaces with same 2D dimensions.

An 2D object still can move in either x-axis, y-axis or z-axis. It's just like what objects you have modelled.
- - - - - - -
3D objects are existed due to 2D surfaces' existence.

I'm born because my father and mother. It might be a good metaphor to describe the answer.
- - - - - - -
More metaphors, ...

An atom is made up of proton(s), neutron(s) and electron(s).

Atoms have mass due to protons', neutrons' and electrons' mass.

Remember Higgs Boson (Higgs particle)!

 

[Rex.]

You might consider about the thickness of an atom or its parts too. There are all 3d.

 

[Zwiebelchen]

One could say this man is "2-D":
http://www.iflscience.com/health-and-medicine/man-born-two-penises


.,.. also, Ariel Winter sports two nice D's...:

This is my apology to those that clicked the first link...

 

[Winimasker]

Oh my god...! I thought the question was "Why are some 2D objects that exists in our 3D world?".

I will pay much more attention to the title of the thread before I give any awkward comments.
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2D objects? Erhh... The leaf? (Is it 2D? It still has thickness, it should be 3D.)

The stamp? The 2D icons with 3D quality? (look at icon section) The shadows?

Is shadows an object? It cannot be handled. :|
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Edit:
2D objects in Maths are rectangle, triangle, square and so forth. Easy!

1D object is a line.

Or maybe... The surface of the object is 2D object.

 

[Ash]

You could say anything, given the right perspective. Like, we are 3d objects that exist in a 4d universe, right?

 

[Rex.]

In Spacetime dimension. Make it 5d.

 

[Squiggy]

My waifu is 2D, yet exists.
Although she's not an object

 

[BlargHonk]

You could say anything, given the right perspective. Like, we are 3d objects that exist in a 4d universe, right?

Depending on the GUT you subscribe to, there can be more than 26 dimensions.

We've only proved there are 4 though.

In summary: Gravity is a fucking bitch to renormalize.

 

[Ash]

Depending on the GUT you subscribe to, there can be more than 26 dimensions.

We've only proved there are 4 though.

In summary: Gravity is a fucking bitch to renormalize.

My head bursts after getting to 10. Flatland was an awesome book for me to get my head around the first few, though...

 

[Wietlol]

You could say anything, given the right perspective. Like, we are 3d objects that exist in a 4d universe, right?

Odd statement...
1d objects only exist in 1d worlds (universes)
2d objects only exist in 2d worlds
3d objects exist in 3d worlds and in 4d worlds?

Something doesnt add up.

 

[Ash]

Odd statement...
1d objects only exist in 1d worlds (universes)
2d objects only exist in 2d worlds
3d objects exist in 3d worlds and in 4d worlds?

Something doesnt add up.

Just your perspective of it.

1d and 2d objects exist in 3d universes, but as 3d objects we see them in their entirety. However, we only see a cross-section of the 4th dimension at any one time.

 

[Wietlol]

Can you give me an example of a 1d object in our world?
If you can give me a valid example, I think I will leave you be.

This game is a nice visualization of a 4th dimension, with one small flaw...
That game is a double 3d world instead of a full 4d world.

This image represents the movement across X and T (and Z but he cant jump for some reason).
However, part A is the here and now, and part B is in the future.
It should be line 1 = 0 and 3 = Infinite.

So in that perspective, the game has a nice design... and you can add infinite amounts of dimensions to it (however it would be a pain to make).
There is one slight problem that comes with the theory "Time is the fourth dimension.".
So small that people just look over it.

 

[Ash]

Can you give me an example of a 1d object in our world?
If you can give me a valid example, I think I will leave you be.

Read this.

 

[Wietlol]

Read this.

TL,DR

Can you not just give me an example?

 

[BlargHonk]

This game is a nice visualization of a 4th dimension, with one small flaw...
That game is a double 3d world instead of a full 4d world.

This image represents the movement across X and T (and Z but he cant jump for some reason).
However, part A is the here and now, and part B is in the future.
It should be line 1 = 0 and 3 = Infinite.

So in that perspective, the game has a nice design... and you can add infinite amounts of dimensions to it (however it would be a pain to make).
There is one slight problem that comes with the theory "Time is the fourth dimension.".
So small that people just look over it.

I prefer Achron's implementation.
https://www.youtube.com/watch?v=CTVsXbWQXp0

 

[PurgeandFire]

Just say a shadow.

It won't be the correct answer, but your physics prof/teacher will have to take a moment to justify why it isn't 2D--or why it isn't an object (rather, it is the absence of light). It won't get you an A, but he might respect your answer a bit.

Or he might not. He might think you're dumb. I don't know.

 

[Squiggy]

You could take the approach of bezier splines (connected vectors used to describe a shape using functions, per se) inside a program like Cinema 4D.
The created vector(s) - like,

f(t) =
(6t-3t²-3t³
12t-24t²+14t³ )

[^vBulletin doesn't into maths formatting. This should be a large bracket around both lines...]

given you use a power of ² (not 100% sure) would have only 2 dimensions but still be treated as an object inside the 3D workspace.
Give me a few to confirm this assumption

 

[Wietlol]

If I can find answers to this question, I will automatically get an A in Physics for the semester.

I actually missed the OP question because someone asked me a different question based on one of the answers.

As far as I can see it, an X-dimensional world can only contain X-dimensional objects.
All other objects just "look" X± (ussually <X) way because of how they are represented.

There is nothing in this dimension that has zero thickness. The thinnest you can possibly get with matter is roughly one angstrom.

Aka, 1d objects in 1d worlds, 2d objects in 2d worlds and 3d objects in 3d worlds, not in any different way.

All the bits in your computer are 3d objects even though you ussually see them as 1d or 2d arrays.
But when you break your computer open, you see how they are simple switches... you may need to buy the eye upgrade of accuracy

All the pixels on your screen are also 3d, they are tiny lights that are lit up in different colors (RGB) and with that, they represent a visualization of something that we see as a website or a tank.

And then we have something that only DSG can see:

Define "object"...

Ofcourse there are different definitions of objects and you didn't define what kind of object you were talking about. It could be very true that the one who told you about 2d objects in 3d worlds also didn't tell you what objects he was talking about.
And in that case, 1d, 2d, 4d, 5d, etc-d objects can exist in a 3d world.
Except that those objects won't be physical objects made out of atoms (sorry if I fail my physics, I haven't bothered about them for years).

An idea can be an object, but it doesn't have a weight, it doesnt have a size, it doesn't have anything that physical objects have that makes them a physical object.

So if you refer to "tree", "man", "computer", "water" as objects, then no, there don't exist 2d objects in a 3d world.
But when you include "idea", "knowledge", "fantasy", "name", etc as objects, then yes, these objects have 0 meaning in dimensions thus can exist in x-dimensional world.
(However, I fail to give you an example of a 2d "object".)