在实际生活中,有时会遇到这样的问题:就是要把一个厚度均匀的物体平均分成两份,而且希望分发越简单越好。很显然,“一刀切”的方法是最简单的。用一条直线把一个平面图形划分为两个面积相等的部分,叫作图形的平分。这条直线叫作这个图形的平分线。一个图形若能够被平分且能用尺规作图的方法确定它的平分线,那它有多少条平分线?怎样作出它的平 In real life, sometimes encounter such a problem: it is to be an average thickness of the object is divided into two, and hope that the distribution of the simpler the better. Obviously, the “one size fits all” approach is easiest. With a straight line to a plane graphic is divided into two equal parts, called the bisect of the figure. This line is called the bisector of the graph. How many bisectors does it have and how it can be made flat if it can be bisectable and can be determined by its ruler