六年级数学下册第六单元《整理和复习》(图形与几何)课件新人教版.ppt

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第1课时 图形的认识与测量,复习,复习目标,通过复习: 1.进一步认识线段、射线和直线的特征以及它们之间的联系与区别; 2.进一步认识角和角的分类; 3.熟练掌握四边形、三角形、圆等平面图形的特点,以及长方形、正方形、平行四边形、三角形、梯形、圆的周长或面积的计算方法,并能解决有关实际问题。,一、直线、线段和射线。,1、直线、线段和射线有什么特征?它们之间有什么联系和区别?,总结:直线、射线、线段的区别与联系,2、在同一个平面内,两条直线可能有哪几种位置关系?,1、请在纸上画出两条直线。,2、同一平面内,两条直线有几种位置关系?,在同一个平面内,两条直线位置关系:,相 交 或 平 行,

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