“几何图形初步”中的有关知识是今后学习其他几何知识的基础.在学习这部分知识时,有些同学由于对有关知识理解不透彻,运用时常出现这样或那样的错误.现对其中一些典型错误加以剖析,希望同学们汲取教训,不犯或少犯类似错误.一、似是而非出错 Relevant knowledge in Geometry Preliminary is the basis for learning other geometric knowledge in the future.While learning this part of knowledge, some students often make mistakes one way or another due to the lack of thorough understanding of relevant knowledge. Typical mistakes to be analyzed, I hope students learn the lesson, do not make or make fewer mistakes.