江阴市夏港中学2016-2017学年八年级上第1周周练数学试卷含答案解析
一、选择题                                                                                                                  
1．下列各组中是全等形的是（　　）                                                             
A．两个周长相等的等腰三角形         B．两个面积相等的长方形            
C．两个面积相等的直角三角形         D．两个周长相等的圆             
【考点】全等图形．                                                                                                     
【分析】根据能够完全重合的两个图形叫做全等形进行分析即可．                       
【解答】解：A、不一定是全等形，故此选项错误；                                      
B、不一定是全等形，故此选项错误；                                                             
C、不一定是全等形，故此选项错误；                                                             
D、是全等形，故此选项正确；                                                                             
故选：D．                                                                                                                     
【点评】此题主要考查了全等图形，关键是掌握全等图形的概念．