点到直线距离：同心圆扩大演示
2015-11-18 03:09
本范例演示点到直线距离的几何构造，通过同心圆扩大直观展示距离变化与几何关系。利用圆、线段、交点和角度等对象，结合条件语句进行动态构造，帮助理解点到直线距离的几何意义及解析几何应用。
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