长方体的棱长总和教学教材.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,*,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,*,面,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长方体面的特点：,1、长方体有,6,个面；,2、每个面都是,长方形,，特殊情况下有,两个相对的面是正方形,；,3、,相对的面,完全相同。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,顶点,长方体有,8,个顶点。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,棱,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长方体棱的特点：,1、长方体有,12,条棱；,2、,相对的棱,长度相等；,3、相交于,同一个顶点,的三条棱长度分别叫做长方体的,长、宽、高,。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长,宽,高,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长发生变化,宽不变,高不变,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长发生变化,宽不变,高不变,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长不变,宽发生变化,高不变,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长不变,宽发生变化,高不变,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长不变,宽不变,高发生变化,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长发生变化,宽变化,高变化,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长、宽、高相同时，长方体就变成了正方体。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长方体的棱长总和,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,学习目标：,准确找到一个长方体的长、宽、高。,掌握长方体棱的特点，会计算一个长方体的棱长总和，并能解决实际问题。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,相交于同一个顶点的三条棱分别叫做长方体的,长、宽、高,。,长,宽,高,棱长总和=,长,4+,宽,4+高4,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,长,宽,高,长4,高4,宽4,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,1、求出下列长方体的棱长总和。,8厘米,4厘米,6厘米,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,10,4,2,1、求出下列长方体的棱长总和。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,2、选择题,一个长方体的长是8厘米，宽是7厘米，高是5厘米，棱长总和是（）厘米,A.20 B.40 C.60 D.80,D,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,3、一个长、宽、高分别为40cm、30cm、20cm的小纸箱，在所有的棱上粘上一圈胶带，至少需要多长的胶带？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,3、一个长、宽、高分别为0.4m、30cm、20cm的小纸箱，在所有的棱上粘上一圈胶带，,至少需要多长的胶带,？,求纸箱的棱长总和,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,3、一个长、宽、高分别为,0.4m,、30cm、20cm的小纸箱，在所有的棱上粘上一圈胶带，,至少需要多长的胶带,？,求纸箱的棱长总和,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,4、,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,5、,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,6、小兰有一根长75厘米的铁丝，她要用这根铁丝做一个长7厘米，宽6厘米，高5厘米的长方体框架，这根铁丝够长吗？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,7、一个长方体的高是16分米，底面是周长为32分米的正方形，这个长方体的棱长之和是多少分米？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,8、至少需要多少厘米长的铁丝，才能做一个底面周长是18厘米，高3厘米的长方体框架？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,9、做一个棱长是6厘米的正方体框架，至少需要多长的铁丝？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,10、一个正方体的一个面是36平方厘米，它的棱长总和是多少？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,11、一个长方体有两个面是正方形，边长是4厘米，它的高为7厘米，这个长方体的棱长总和是多少？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,学习目标：,准确找到一个长方体的长、宽、高。,掌握长方体棱的特点，会计算一个长方体的棱长总和，并能解决实际问题。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,作业,自己动手利用牙签制作一个长方体 框架。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,