3D

When we look at something, we see that it is 3D. But what is 3D? 3D is the world that leads to real imaging. But, what about movies? You may think they are 3D. But, only some types are 3D. Most of them are 2D. D stands for dimension. 1D means one line. 2D is a shape. 3D is an object. 4D and etc is hyper. Let us extend a 1D object, or a point to a 1D figure, as a line. Now, we will stretch the edges to form a square. Then use its tops and make a cube. Now, probably you have heard about polyhedrons. Now, polyhedrons are 4D. 4D means 2 3D shapes added together.
Category:Geometry
Category:Math