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

That’s the fun part: we don’t.

What we can do, however, is project a 4D shape down to 3D (like tracing the shadow of a 3D object gives us what it looks like in 2D) and step through the 4th dimension to get an animation of what it may kinda sorta look like.

[Here’s a video that explains what I mean](https://youtu.be/C6kn6nXMWF0).