檢視割线定理的原始碼

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中文名称；割线定理

外文名称；Secant Theorem

表达式；LA·LB=LC·LD=LT²

提出者；Jakob Steiner

提出时间；约西元1800

适用领域；几何

应用学科；数学、物理等

类属；圆幂定理

作用；求线段长度
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'''切割线定理'''：从圆外一点引圆的[[切线]]和割线，切线长是这点到割线与圆交点的两条线段长的比例中项。切割线定理的推论：从圆外一点引圆的两条割线，这一点到每条割线与圆的交点的两条线段长的积相等。<ref>[https://wenku.baidu.com/view/2f09115fbe23482fb4da4cd2.html 割线定理],百度 ,2018年7月1日</ref>