面动成体：半圆旋转生成球体
2020-07-25 01:35
本 GeoGebra 范例直观演示了“面动成体”的几何原理，具体展示了半圆绕其直径旋转一周生成球体的过程。通过 Intersect、Segment、Semicircle、Rotate 和 Surface 等命令，构建了半圆及其旋转轴，并利用参数控制旋转角度，动态生成球面。该模型有助于学生理解立体几何中旋转体的形成机制，是学习空间几何与微积分中旋转体体积概念的优秀可视化教具。
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