What is a 4d shape?

Question

I have been searching everywhere on the net about 4d but not understanding that what is a 4 shape. Please can u define or explain it to me .

Answer 1

It could refer to what is called a tesseract, which is a cube in 4-dimensional space, also called an 8-cell or a tetracube. Analogous to how a cube in 3-dimensional space is bounded by six 2-dimensional surfaces, a tesseract in 4-dimensional space is bounded by 8 cubes, and hence the name 8-cell.  Of course we can never see or draw a tesseract (see Mikaila's comment), but its projection into 3-dimensional space would look like a cube embedded in a cube, with the corners connected, similar to how the projection of a 3-dimensional cube into 2 dimensions looks like 2 squares, with the corners of the squares connected.