摘要
There are three different common w(?)measure the size of a three dimensional figure. Consider the shoe box below. We can measure the total length of its edges. Like perimeter, this is one-dimensional. We can measure its surface area,which is two-dimensional. Or we can measure its volume,which is three-dimensional. The shoebox has edges of lengths 14inches,5inches,and 7inches, There are four edges of each length. (some are hidden from view.)The total length of all edges is 4·15"+4·7"+4·14",or 104inches.
