许多初二同学在学了尺规作图后，对所谓“三等分角”问题产生了浓厚的兴趣．他们花费了大量的时间去攻这个“难题”，甚至到了废寝忘食的地步，但这种努力的结果都是徒劳的，因为他们多半是在对尺规作图和它的历史一无所知的情况下盲目上阵的，要是他们多少了解一些有关的历史 Many students in Grade two had a keen interest in the so-called “trivial angle” after they learned how to draw rulers. They spent a lot of time to attack this “hard problem”, even to the point where they forgot to eat and sleep, but the results of this effort are futile because they are mostly unaware of the ruler drawing and its history. If we go blindly into battle, if they learn more about some related history