Projection (mathematics)

Projection is a fancy way of saying making a picture of something. In mathematics, projection is a way of seeing what something looks like on a flat surface, using mathematics. For example, let's imagine you have a three-dimensional shape, like a cube. You can project that cube onto a flat piece of paper using mathematics. That way, you can make a diagram of the cube so you know what it looks like without having to actually build the cube in real life.