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Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.地球我们生活的家园Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.泰姬陵位于印度朱木拿河岸边的古城阿拉格,是一座王妃的陵墓.一个关于爱情的见证!Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.观察下面的图片,这些图片中的物体具有什么几何结构特征?你能对它们进行分类吗?分类依据是什么?提出问题Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.如何依据一定的标准,把前面的物体的几何结构特征表示出来?提出问题Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.下图中的物体具有什么样的共同的结构特征?提出问题①有两个面互相平行;②其余各面都是平行四边形;③其余每相邻的两个四边形的公共边都互相平行.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.通过观察有以下特征:1、有两个面全等且互相平行2、其余各面都是平行四边形3、每相邻两个四边形的公共边都互相平行。我们把满足上面三个条件的几何体称为棱柱(prism)。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.一、观察下列几何体并思考:具备哪些性质的几何体叫做棱柱?ABCDA1A1B1B1C1C1D1ABCA1B1C1D1E1ABCEDEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.1、定义:有两个面互相平行,其余各面都是四边形,并且每相邻两个四边形的公共边都互相平行,由这些面所围成的几何体叫做棱柱。两个互相平行的平面叫做棱柱的底面,其余各叫做棱柱的侧面。相邻侧面的公共边叫做棱柱的侧棱。侧面与底的公共顶点叫做棱柱的顶点。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.底面侧面侧棱顶点Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.2、棱柱的分类:棱柱的底面可以是三角形、四边形、五边形、……我们把这样的棱柱分别叫做三棱柱、四棱柱、五棱柱、……三棱柱四棱柱五棱柱Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.3、棱柱的表示法(下图)用平行的两底面多边形的字母表示棱柱,如:棱柱ABCDE-A1B1C1D1E1。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.1一个长方体,能作为棱柱底面的有几对?探究Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.一个长方体,能作为棱柱底面的有几对?探究Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.一个长方体,能作为棱柱底面的有几对?探究Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.一个长方体,能作为棱柱底面的有几对?探究Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.2长方体按如图截去一角后所得的两部分还是棱柱吗?探究A’B’C’D’ABCDEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.长方体按如图截去一角后所得的两部分还是棱柱吗?探究ABCDA’B’C’D’EFGHF’E’H’G’Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.3螺丝杆头部是个六棱柱外形,它有几对平行平面?能作为底面的有几对?探究Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.螺丝杆头部是个六棱柱外形,它有几对平行平面?能作为底面的有几对?探究Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.螺丝杆头部是个六棱柱外形,它有几对平行平面?能作为底面的有几对?探究Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.螺丝杆头部是个六棱柱外形,它有几对平行平面?能作为底面的有几对?探究Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.螺丝杆头部是个六棱柱外形,它有几对平行平面?能作为底面的有几对?答案:4对平行平面,只有一对能作为底面.探究Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.4有两个面互相平行,其余各面都是平行四边形的几何体是棱柱吗?探究定义:1、有两个面互相平行,2、其余各面都是四边形,3、每相邻两个四边形的公共边都互相平行。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.探究5棱柱的侧棱与底面一定是垂直的吗?定义1、有两个面互相平行,2、其余各面都是四边形,3、每相邻两个四边形的公共边都互相平行。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.二、棱锥的结构特征观察下列几何体,有什么相同点?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.1、棱锥的概念有一个面是多边形,其余各面是有一个公共顶点的三角形,由这些面所围成的几何体叫做棱锥。这个多边形面叫做棱锥的底面。有公共顶点的各个三角形叫做棱锥的侧面。各侧面的公共顶点叫做棱锥的顶点。相邻侧面的公共边叫做棱锥的侧棱。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.棱锥的底面棱锥的侧面棱锥的顶点棱锥的侧棱SABCDEEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.2、棱锥的分类:按底面多边形的边数,可以分为三棱锥、四棱锥、五棱锥、……ABCDS3、棱锥的表示方法:用表示顶点和底面的字母表示,如四棱锥S-ABCD。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.三、棱台的结构特征B1A1C1D1C1B1A1D1棱锥:有一个面是多边形,其余各面是有一个公共顶点的三角形,由这些面所围成的几何体叫做棱锥。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5
本文标题:高一数学必修第一章空间几何体
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