An open box is to be made by cutting a square from each corner of a 12-in.by 12-in.Piece of metal and then folding up th
问题描述：
An open box is to be made by cutting a square from each corner of a 12-in.by 12-in.Piece of metal and then folding up the side.
答
一个拆开的盒子就是将一张12x12英寸的铁板的每个角切开使成正方形,然后将各而折起来.