Dimensions refer to the measures of spatial extent like length, height, and width. According to physics, there are 5 dimensions, while math recognizes 3 dimensions. The 0th dimension contains a single dot of information. The 1st dimension results from an infinite number of 0th dimension dots combined to form a line. The 2nd dimension, also called a plane, is formed from the combination of infinite 1st dimension lines. The 3rd dimension adds depth by combining planes to form three-dimensional cubes and figures. Einstein's theory proposed a 4th dimension beyond the typical 3 dimensions by adding a fourth side. The 5th dimension would combine all previous dimensions according to Einstein's theory.