两圆的位置关系
2019-08-01 15:06
本范例通过 GeoGebra 动态演示两个圆之间的五种位置关系：外离、外切、相交、内切与内含。用户可调节两圆半径 R₁、R₂ 及圆心距 O₁O₂，实时观察圆心距与半径之和、半径之差的大小关系如何决定两圆的相对位置。构造中包含圆心 O₁、O₂，半径线段，交点标注及距离计算，直观呈现解析几何中圆与圆位置关系的判定条件，适用于中学平面几何与解析几何教学。
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