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梯形是《四边形》一章中的难点,如何化解这一难点,常常要考虑添加辅助线。如何添辅助线是有一定方法可循的,这方面来稿比较多,我们综合了如下同志的来稿,形成此文。其中有江苏昆山市大市中学昊本环;江苏启东市汇龙中学周雪华、王向东;安徽怀宁县洪镇初中陈敏;江苏宜兴丁蜀高级中学汤文兵;福建晋江养正中学杨玉山;江苏灌云县东王集乡育才中学黄俊林;甘肃宁县太昌中学董建宏;江苏射阳县特庸中学刘亚芹;江苏兴化市边城中学汤春根;四川广安市悦来中学彭光辉。
Trapezoidal is a difficult point in the chapter of “Quadrangle”. How to resolve this difficulty often involves adding auxiliary lines. How to add an auxiliary line is a certain way to follow. In this aspect, there are more manuscripts. We have synthesized the following comrades’ contributions to form this article. Among them are the Daban Middle School in Kunshan City, Jiangsu Province; the Huilong Middle School in Qidong City, Jiangsu Province; Zhou Xuehua and Wang Xiangdong; the junior high school in Huan Ning County, Anhui Province; Chen Min in the Middle School of Hongzheng, Huaining County; Tang Wenbing, Dingyi Senior High School in Yixing City, Jiangsu Province; Yang Yushan, Fujian Jinjiang Yangzheng Middle School; Yunxian Dongwangji Township Yucai Middle School Huang Junlin; Gansu Ning County Taichang Middle School Dong Jianhong; Jiangsu Sheyang County Taiyong Middle School Liu Yaqin; Jiangsu Xinghua Biancheng Middle School Tang Chungen; Sichuan Guangan City Yuelai Middle School Peng Guanghui.