广州市海珠区2015-2016学年八年级上期末数学试卷含答案解析  
6．多边形每个外角为45°，则多边形的边数是（　　）                                   
A．8       B．7        C．6       D．5
【考点】多边形内角与外角．                                                                   
【分析】利用多边形外角和除以外角的度数即可．                                          
【解答】解：多边形的边数：360÷45=8，                                                 
故选：A．                                                                                          
【点评】此题主要考查了多边形的外角，关键是掌握正多边形每一个外角度数都相等．