本书是"好题全家桶”系列丛书的第四本，聚焦于初中数学几何中的四边形，通过分层训练的方式帮助学生掌握四边形部分的知识。本书以题目类型为依据划分，先讲解经典例题，再进行分层训练，使不同基础的学生都能找到合适的题。此外，本书的答案部分解题步骤详细、规范，帮助学生逐渐规范答题步骤，理清逻辑思维。

陈丁卫，在学而思从事初中数学一线教学多年，S级主讲教师和优秀主备教师，参与打磨了数百册初中数学内部教材，拥有十年以上的初中数学教研实战经验。

第1 节 平行四边形 ·······································································.1
第2 节 菱形 ···············································································.10
第3 节 矩形 ···············································································.21
第4 节 正方形 ············································································.31
第5 节 梯形 ···············································································.42
第6 节 中点四边形 ······································································.47
第7 节 新定义四边形 ···································································.54
第8 节 四边形与动点 ···································································.64
第9 节 四边形中的最值 ································································.72
第10 节 四边形综合 ·····································································.85
解题方法详解 ···············································································.90