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4.1.1 立体图形与平面图形 PowerPoint PPT Presentation


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4.1.1 立体图形与平面图形. “ 几何”学的主要研究对象:. 图形的形状、大小和位置关系. 你能说出下列图形的名字吗?. 三角形. 五边形. 平行四边形. 正方形. 梯形. 八边形. 圆. 椭圆. 圆环. 五角星. 几何图形的各部分都在同一平内,这样的几何图形叫做平面图形. 观察下列图形,从中找出你熟悉的几何图形:. 从实物中抽象出来的各种图形统称为几何图形. 你识这些图形吗?. 长方体. 正方体. 圆柱体. 棱柱. 棱锥体. 球体. 圆锥体. 圆台. 它们有什么特征?.   几何图形的 各部分不都在同 一平面内,我们

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4.1.1 立体图形与平面图形

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