If you ask some one what the fourth dimension is they will probably say it is time. That cannot be the case because there are three dimensions of time, past, present, and future. If you look for a picture you will probably see something like this.
The first picture [tesseract] is just a cube inside a cube and doesn't represent a extra dimension in any way. The second picture is a representation of three dimensions of space and one dimension of time. It indicates the cube does not just exist a one point in time. When I was bored doing math one day I discovered a way to possible draw a true four dimensional cube or tet as I like to call it. In a square the cross section or corner points two directions. In a cube the cross section or vertex points three directions so the cross section on a tet must point four directions. A square has four sides, a cube has six sides therefore a tet must have eight sides.If there where 4 dimensions of space would there also be 4d of time and 4d of matter? In a 3d world we have space, time, and matter. If we lived in a 4d world would there be some forth thing with 4d of that two? Interesting thoughts. You can try to draw a 4d figure yourself with the info above and some of your own discoveries. For more things to ponder keep reading the philosophy of everything.
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