最新点线面体ppt课件.ppt

《最新点线面体ppt课件.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、点、线、面、体4.1.22021/8/181__________________________________________________你能找出常见的几何体吗?2021/8/182__________________________________________________立体图形又叫做几何体简称为体常见的立体图形包围着体的是面。面有平的面和曲的面两种长方体正方体圆柱圆锥球棱柱棱锥2021/8/183__________________________________________________面平面曲面2021/8/184_____________________

2、_____________________________平面曲面2021/8/185__________________________________________________平面2021/8/186__________________________________________________曲面2021/8/187__________________________________________________曲面平面2021/8/188__________________________________________________曲面2021/8/189__

3、________________________________________________练习：围成下面这些立体图形的各个面中，哪些面是平的？哪些面是曲的？平面曲面2021/8/1810__________________________________________________面与面相交的地方形成线2021/8/1811__________________________________________________面与面相交的地方形成线2021/8/1812__________________________________________________面与面相交

4、的地方形成线2021/8/1813__________________________________________________2021/8/1814__________________________________________________2021/8/1815__________________________________________________线：直线和曲线2021/8/1816__________________________________________________点2021/8/1817__________________________

5、________________________点2021/8/1818__________________________________________________·································点动成线2021/8/1819__________________________________________________探究点动成线2021/8/1820__________________________________________________点动成线2021/8/1821_____________________________

6、_____________________点动成线2021/8/1822__________________________________________________线动成面2021/8/1823__________________________________________________线动成面2021/8/1824__________________________________________________线动成面2021/8/1825__________________________________________________线动成面2021/8/182

7、6__________________________________________________面动成体三角形绕一边旋转成圆锥体2021/8/1827__________________________________________________长方形绕一边旋转成圆柱体面动成体2021/8/1828__________________________________________________点动成——线动成——面动成——线面体体是由面组成面