The terms 2D and 3D stand for two-dimensional and three-dimensional respectively. When we are to define the appearance or existence of a certain object in space, we use terms like two-dimensional or three-dimensional to describe their structure. It means that the object is either existing in two dimensions (length and breadth) or three-dimensions (length, breadth and height). There also exists four-dimensional, five-dimensional, six, seven and so on and so forth structures.

**2D vs 3D**

The difference between two-dimensional and three-dimensional structures is the absence of z-axis in 2D structures, rendering them plane or flat figures. Three-dimensional structures have an extra Z-axis to add depth to their structures. For example, you can see and understand a cube or a prism that they are existing in three dimensions; length, breadth and height. Whereas, this is not the case for two-dimensional structures. They only have two allotted axes to define their measurements, that is, length and breadth.

A 2D shaped object will comprise of length and breadth, visible to our eyes. They are sometimes also referred to as plane figures or flat shapes since their dimension limits to two-dimensional structure, not extending to height, therefore, appearing flat or plane to the eyes. Most common examples of 2D structures can be a sheet of paper, circle, square, rectangle and pentagon.

A 3D shaped object will comprise of length, breadth and height, visible to our eyes. Unlike two-dimensional structures, they do not appear flat or plane. While 2D structure only uses two surfaces (X and Y axes) to deter its measurements, 3D uses another axes (Z) to further give depth to its structure. Most common examples of 3D structures can be a cube, cuboid, prism, pyramid and cylinder.

## Comparison Table Between 2D and 3D (in Tabular Form)

Parameters of Comparison | 2D | 3D |
---|---|---|

Axes used | A two-dimensional structure uses only two axes, x axis and y axis respectively. | A three-dimensional structure uses three axes, x axis, y axis and z axis respectively. |

Defining dimensions | Length and breadth | Length, breadth and height |

Another name | Are also referred to as “plane” figures or “flat” figures due to their appearance. | Are only referred to as 3D figures. |

Examples | Circle, square, rectangle and pentagon. | Prism, cuboid, pyramid and cylinder. |

Volume | Has no volume | Has volume |

## What is 2D?

A 2D or a two-dimensional structure is an object existing in two dimensions to define its structure, that is, it exists in two planes or axes, x-axis and y-axis, to deter its shape. A 2D figure has only length and width in x-axis and y-axis respectively. Since two-dimensional figures can exist on a flat surface, they are also called plane figures or plane shapes. These figures do not have any volume, unlike 3D figures. They exist on flat surfaces. They can area as much as possible, but they certainly do not have any volume due to their restricting shape.

We have a variety of shapes and intangible structures encircling our daily lives. Out of these various shapes, 2D and 3D objects are the most common type of structure we usually come around. Good examples of 2D structures can be sheets, circular objects, rectangular objects, square objects and pentagons.

These objects exist strictly within the periphery of x-axis and y-axis. They cannot cross or overtop these two margins, which is not the case for 3D structures. Geometrically speaking, two-dimensional objects can be seen as existing in between two imaginary dimensions/planes, labelled as x-axis and y-axis respectively.

## What is 3D?

A 3D or a three-dimensional structure is an object existing in three dimensions to define its structure, that is, it exists in three planes or axes, x-axis, y-axis and z-axis, to deter its shape. A 3D figure has length, width and height in the x-axis, y-axis and z-axis respectively. Unlike 2D figures, 3D figures exist beyond the margins of a flat or plane surface, they have a defining depth to their structure which extends to a new dimension called the z-axis. This added axis is to deter the height of the figure.

Since they do not exist within the parameters of two dimension, they are not plane or flat figures, instead they have volume in them which is a major point of difference in 2D and 3D structures.

As mentioned earlier, we have a variety of shapes and intangible structures surrounding our daily lives. Out of these various shapes, 2D and 3D objects are the most common type of structure we usually come across. Good examples of 3D structures can be sheets, cuboid objects, pyramids, cylindrical objects and prisms.

**Main Differences Between ****2D and 3D**

**2D and 3D**

- A two-dimensional structure uses only two axes, the x-axis and y-axis respectively. Whereas, a three-dimensional structure uses three axes, x-axis, y-axis and z-axis respectively.
- A two-dimensional structure has only two surfaces; length and breadth. A three-dimensional structure has three surfaces; length, breadth and height.
- Two-dimensional figures are also referred to as “plane” figures or “flat” figures due to their appearance. Whereas three-dimensional figures are only referred to as 3D figures.
- Examples of two-dimensional structures are circle, square, rectangle and pentagon. Examples of three-dimensional structures are Prism, cuboid, pyramid and cylinder.
- A two-dimensional structure has no volume. Whereas, a three-dimensional structure has volume.

## Conclusion

Determining the integrity of an object or a figure can be interesting if you understand the axis or planes in exists in. A 2D shaped object will comprise of length and breadth, visible to our eyes. They are sometimes also referred to as plane figures or flat shapes. On the other hand, a 3D shaped object will comprise of length, breadth and height, visible to our eyes.

Unlike two-dimensional structures, they do not appear flat or plane. Another major difference is that 2D figures do not have volume in them whereas 3D is said to have volume. We have a variety of shapes and intangible structures encircling our daily lives. Out of these various shapes, 2D and 3D objects are the most common type of structure we usually come around.