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.1.1_1.1.2柱、锥、台、球的结构特征简单组合体的结构特征情境导学素材新人教A版必修2.doc

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11.1.1-1.1.2 柱、锥、台、球的结构特征 简单组合体的结构特征【情境导学】小学和初中我们学过平面上的一些几何图形,如直线,三角形,长方形,圆等.现实生活中,我们周围还存在着很多不是平面上而是“空间”中的物体,它们占据着空间的一部分,如粉笔盒、足球、易拉罐等.如果只考虑这些物体的形状和大小,那么它们有很多相同的特征.观察下面两组物体,你能说出各组内物体的共同点吗?(1) (2) (第(1)组中每个物体都是由多个平面多边形围成,第(2)组中每个物体都是由平面图形旋转得到)

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