长方体和正方体表面积的实际应用教学提纲.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,长方体与正方体的表面积,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长方体、正方体的表面积指的,是什么？,表面积计算的应用,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长方体的上、下每个面的面积,=,长宽,长高,长方体的左、右每个面的面积,=,宽高,怎样求长方体(或正方体)的表面积?,长方体的前、后每个面的面积,=,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长方体的表面积=,长宽2长高2宽高2,上、下,的面积,前、后,的面积,左、右,的面积,（长宽长高宽高）2,表面积计算的应用,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,正方体的表面积=棱长棱长6,一个面,的面积,表面积计算的应用,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,做一个棱长是厘米的实物架挂在墙上，请问要用多少平方分米纸板？,棱长棱长5,=5,=（平方厘米）,厘米,厘米,厘米,答：要用平方分米纸板。,=（平方分米）,20,20,5,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,说一说该求哪部分的面积,给一个长方体罐头盒贴包装纸，求包装纸的面积。,给一个长方体的领操台刷上油漆，求粉刷的面积。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,选择：,化工厂要建一个长方体蓄水池，计划在蓄水池的外部涂蓝色的涂料，在内壁及底面贴瓷砖，则涂颜色部分的面积是指（）的面积之和，贴瓷砖的面积是指（）的面积之和，这个水池的占地面积是指（）的面积。,（墙壁厚度忽略不计）,a.前、后、左、右面,b.前、后、左、右、上、下面,c.前、后、左、右、下面,d.底面,a,c,d,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,（1）长方体通风管道的用料面积,（2）长方体水池内铺瓷砖的面积,（3）教室内粉刷墙面的面积,（4）长方体油桶的用料面积,这些问题分别要求长方体哪几个面的面积？,考考你的想象力：,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,分析在实际计算下列物体面积时，应考虑几个面的面积。,、火柴盒的外壳用料。,、火柴盒的内壳用料。,、粉刷教室的四壁和上面。,、给长方体饼干罐的四周贴一圈的商标纸。,、给礼堂内长方体柱子油漆。,、做一个长方体形状的铁皮流水糟用料。,、用木料做一个抽屉。,说,说,一,五个面,五个面,四个面,五个面,四个面,四个面,四个面,、制作一个无盖的长方体铁皮桶的用料。,五个面,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,0.750.5+0.751.62+0.51.62,=0.375+2.4+1.6,=4.375（平方米）,答：至少需要用布4.375平方米。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,走进生活三：,一个教室的长是 8米，宽是6米，高是4米。要粉刷教室的屋顶和四面墙壁。除去门窗和黑板面积25.4平方米，粉刷的面积是多少平方米？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,生活中的数学,一节,通风管,长50厘米，宽10厘米，高8厘米，做这样的一对通风管至少需要多少铁皮？,50,10,8,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,1.一根96厘米长的铁丝做成一个正方体框架，做成后在它的表面糊纸，至少要用,多少平方厘米的纸？,96 12=8(cm),练习题,答：至少要用384平方厘米的纸。,886=384(cm,2,),或:(96,12)(9612)6=384(cm,2,),Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,水池占地多少平方米？,5025+502.52+252.52,=1250+250+125,=1625（平方米）,答：共需要贴1625平方米的瓷砖。,502=25（米）,5025=1250（平方米）,3,3、如果沿水面在池壁画一道水位线，水位线有多长？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,一种火柴盒，长4厘米，宽3厘米，高1厘米，做一个这样的火柴盒，外壳、内芯各要纸多少平方厘米？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,火柴,（43+41）2=32（平方厘米）,43+（41+31）2,=26（平方厘米）,答：外壳用纸32平方厘米，内芯用纸26平方厘米。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,