How can we know what a four dimensional object looks like?

Question

So i recently saw how a cube would look like in 4 dimensions (Tesseract) but how do we know what it looks like if we live in a 3 dimensional world?

In: 2

Answer 1

Think about how you can have a projection of a 3D object onto a 2D plane. Similarly, we can predict what the projection of a 4D object would look like in a 3D space.