# Difference between 2D and 3D

##### Key Difference: The term 2D and 3D are used to indicate dimensions. The term 2D stands for Two-Dimensional, whereas 3D stands for Three-Dimensional. 2D represents an object in just two dimensions, while 3D represents it in three dimensions.

The term 2D and 3D are used to indicate dimensions. A dimension is ‘any measurable spatial extent, such as length, breadth, height, depth, width, thickness, etc.’ Essentially, dimension indicates any and all sides of an object, such as height and width, and allows us to measure them.

The term 2D stands for Two-Dimensional, whereas 3D stands for Three-Dimensional. 2D represents an object in just two dimensions, while 3D represents it in three dimensions. It is best to think of it with an example. A car has three dimensions. In fact, everything in our reality is three-dimensional. It has length, width, and height; however a photograph of a car or a drawing of a car has only two dimensions. In the photo or drawing, one can only see and measure length and height, whereas the depth or width is indistinguishable.

In mathematics and physics, 2D is defined as having two axes to plot, usually the x-axis and y-axis. These axes are indicative of two aspects on the same plane, which can be plotted on the Cartesian coordinate system. Similarly, 3D indicates three aspects, which are plotted on the x-axis, y-axis and the z-axis.

When referring to geometry, a line drawn on a on a sheet of paper is 1D, which means that it only has aspect that is length. Whereas, shapes such as rectangle, square, triangle, polygon, etc., are 2D, which means that they have two aspects, height and length. While, shapes like cylinder, sphere, cube, pyramid, prism, etc., are considered to be 3D as the have height, length, and a third aspect, that is depth.

Additionally, the terms 2D and 3D are also often used to refer to graphic image technology, such as photography, animation, computer graphics. 3D movies are all the rage these days. These represent characters and events in the movies as three-dimensional, which is more like how we would perceive real life, rather than the traditional flat images of 2D.

Comparison between 2D and 3D:

 2D 3D Full Form Two-Dimensional Three-Dimensional Definition Represents an object with just two dimensions, i.e. length, and height. Represents an object with three dimensions: Length, width, and height Representation Flat Life-like Aspects Length, and height, no depth (width). Length, width, and height Mathematics The x-axis and y-axis. The x-axis, y-axis and the z-axis. Geometry Rectangle, square, triangle, polygon, etc. Cylinder, sphere, cube, pyramid, prism, etc.

Image Courtesy: animation-school.net, vimeo.com

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