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According to multiple theories, there are only two known things in this world that are two dimensional (and no, paper is not one of them). The two things are shadows and reflections.Think about it.In order for something to be 2-D, it cannot have any depth. Shadows and reflections have a length and a width, but not a depth. Also, for those of you who are wondering why paper is not 2-D, here's the answer. Although paper is quite thin, it still has a depth. You can feel it.This is a theory to ponder. Scientists and mathematicians alike have recognized that the facts stated above are accurate.

Q: What are the only two things in this world that are 2- Dimensional?

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Clouds are three dimensional, which is very noticeable if you have ever flown through one in a plane (as I have). I would also note that all physical objects are three dimensional; a true two dimensional object only exists as a mathematical abstraction. However, some things come close to being two dimensional. A piece of paper does have some thickness, but for most purposes it can be treated as a two dimensional object.

None.A yard is a measure of distance in 1-dimensional space. An acre (whether in MP or anywhere else in the world), is a measure of area in 2-dimensional space. The two measure different things and, according to the basic laws of dimensional analyses, conversion from one to the other is not valid.None.A yard is a measure of distance in 1-dimensional space. An acre (whether in MP or anywhere else in the world), is a measure of area in 2-dimensional space. The two measure different things and, according to the basic laws of dimensional analyses, conversion from one to the other is not valid.None.A yard is a measure of distance in 1-dimensional space. An acre (whether in MP or anywhere else in the world), is a measure of area in 2-dimensional space. The two measure different things and, according to the basic laws of dimensional analyses, conversion from one to the other is not valid.None.A yard is a measure of distance in 1-dimensional space. An acre (whether in MP or anywhere else in the world), is a measure of area in 2-dimensional space. The two measure different things and, according to the basic laws of dimensional analyses, conversion from one to the other is not valid.

It is flat. 2-D

Yes, a rectangle is only two dimensional, because it only exists on the x and y axises, that is it only is on a single plane. Three dimensional objects exist on the x,y, and z axises. You can think of it as anything that has height or width but is flat is two dimensional, and anything that has height, width, and depth as three dimensional.

Only if you have two dimensional objects of specific sizes in specific combinations.

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Clouds are three dimensional, which is very noticeable if you have ever flown through one in a plane (as I have). I would also note that all physical objects are three dimensional; a true two dimensional object only exists as a mathematical abstraction. However, some things come close to being two dimensional. A piece of paper does have some thickness, but for most purposes it can be treated as a two dimensional object.

Electrons, like all physical objects in the real world, are 3 dimensional (or 4 dimensional if you include time, as Einstein does). Two dimensional objects with zero thickness exist only as mathematical abstractions.

None.A yard is a measure of distance in 1-dimensional space. An acre (whether in MP or anywhere else in the world), is a measure of area in 2-dimensional space. The two measure different things and, according to the basic laws of dimensional analyses, conversion from one to the other is not valid.None.A yard is a measure of distance in 1-dimensional space. An acre (whether in MP or anywhere else in the world), is a measure of area in 2-dimensional space. The two measure different things and, according to the basic laws of dimensional analyses, conversion from one to the other is not valid.None.A yard is a measure of distance in 1-dimensional space. An acre (whether in MP or anywhere else in the world), is a measure of area in 2-dimensional space. The two measure different things and, according to the basic laws of dimensional analyses, conversion from one to the other is not valid.None.A yard is a measure of distance in 1-dimensional space. An acre (whether in MP or anywhere else in the world), is a measure of area in 2-dimensional space. The two measure different things and, according to the basic laws of dimensional analyses, conversion from one to the other is not valid.

It is flat. 2-D

No. The rules of two dimensional geometry can only be used for two dimensional geometry. You can take the basic principles of two dimensional geometry and alter them slightly to be able to apply to three dimensional solids

A one dimensional array is a scalar value repeated one or more times.A two dimensional array is an array of one dimensional arrays.A three dimensional array is an array of two dimensional arrays, and so forth.The one dimensional array is like a list of things, where the two dimensional array is like an array of things. (Think one row of a spreadsheet versus the whole spreadsheet.)[addendum]Every level of array depth is also a level of pointer depth. For example: A 3 dimensional int array is an int***. So a one dimensional int array is an int*, and a two dimensional int array is an int**. This is only important if you are doing pointer work, but it can become very important.

No, it is one dimensional. In only has one measurement, length.

The image of a penny on a table helps readers visualize Flatland by illustrating a two-dimensional world where shapes move and interact only in two dimensions, with no vertical dimension. The penny can only move horizontally along the surface of the table, just like the characters in Flatland can only move within their two-dimensional space. It highlights the limited perspective and spatial constraints of a two-dimensional world.

Yes, a rectangle is only two dimensional, because it only exists on the x and y axises, that is it only is on a single plane. Three dimensional objects exist on the x,y, and z axises. You can think of it as anything that has height or width but is flat is two dimensional, and anything that has height, width, and depth as three dimensional.

A projection.

Only if you have two dimensional objects of specific sizes in specific combinations.

Two dimensional means it exist in only two dimensions, length and height. In geometry, some examples of two dimensional figures are; circles, squares, rectangles, and any polygon. The only conventional dimension these figures do not have is depth.