戴德林球与圆锥曲线
2019-11-09 09:30
本范例演示了戴德林球（Dandelin spheres）的几何构造，用于证明平面截圆锥所得的圆锥曲线（如椭圆、抛物线或双曲线）的焦点性质。通过三维立体几何作图，展示了球体与圆锥及截平面的相切关系，直观揭示了圆锥曲线焦点与准线的几何本质。
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