【摘要】 本文讨论平面图形绕平面内的直线旋转的旋转体体积与被旋转的平面图形的形心的关系.当被旋转的平面图形的内部与旋转轴没有交点时,得到了用被旋转的平面图形的面积以及被旋转的平面图形的形心到旋转轴的距离表示的旋转体体积公式.更多还原

【Abstract】 Consider the solid of revolution obtained by rotating a plane figure about an axis in the plane. If the axis does not intersect the interior of the plane figure, then the volume of the solid of revolution can be obtained by the area of the plane figure and the distance from the center of the plane figure to the axis.更多还原