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多少个正方形
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解答:如图①,

 图①

http://www.czdxw.com/upload/image/20160717/1468738385137520.gifhttp://www.czdxw.com/upload/image/20160717/1468738393928582.gif的方格图案中共有14个正方形.

1)在http://www.czdxw.com/upload/image/20160717/1468738410449079.gif的方格图案中,正方形总数是http://www.czdxw.com/upload/image/20160717/1468738419118858.gifhttp://www.czdxw.com/upload/image/20160717/1468738428196095.gif

长方形总数是http://www.czdxw.com/upload/image/20160717/1468738438105367.gifhttp://www.czdxw.com/upload/image/20160717/1468738447523653.gif

http://www.czdxw.com/upload/image/20160717/1468738457918685.gif的图形中,如果http://www.czdxw.com/upload/image/20160717/1468738467873674.gif,那么正方形总数是http://www.czdxw.com/upload/image/20160717/1468738419118858.gifhttp://www.czdxw.com/upload/image/20160717/1468738428196095.gif

长方形总数是http://www.czdxw.com/upload/image/20160717/1468738438105367.gifhttp://www.czdxw.com/upload/image/20160717/1468738447523653.gif

http://www.czdxw.com/upload/image/20160717/1468738457918685.gif的图形中,如果http://www.czdxw.com/upload/image/20160717/1468738476124624.gif,那么长方形总数是http://www.czdxw.com/upload/image/20160717/1468738486231209.gif;当http://www.czdxw.com/upload/image/20160717/1468738495648747.gif时,正方形总数是http://www.czdxw.com/upload/image/20160717/1468738503558724.gif;当http://www.czdxw.com/upload/image/20160717/1468738514287452.gif时,正方形总数是http://www.czdxw.com/upload/image/20160717/1468738523908788.gif

2)如图②,

  

图②

http://www.czdxw.com/upload/image/20160717/1468738544266280.gif的立体图形中,正方体的总数是http://www.czdxw.com/upload/image/20160717/1468738553114636.gif

长方体的总数是http://www.czdxw.com/upload/image/20160717/1468738562105634.gif

http://www.czdxw.com/upload/image/20160717/1468738571526364.gif的图形中,立方体的总数是http://www.czdxw.com/upload/image/20160717/1468738581140640.gif;长方体的总数是http://www.czdxw.com/upload/image/20160717/1468738590853879.gif

http://www.czdxw.com/upload/image/20160717/1468738600786405.gif的图形中,长方体的总数是http://www.czdxw.com/upload/image/20160717/1468738609118143.gif

3)如图③,图中有多少个平行四边形?更一般的规律是什么?

  

 解析:正确解答该题的方法是,由简到繁寻求规律,注意正方形是特殊的长方形,正方体是特殊的长方体.