檢視圆周角的原始碼

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中文名；圆周角

外文名；subtended angle at the circumference

特点；顶点在圆上，两边为圆的两条弦。

学科；数学
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'''圆周角'''最初叫詹妮特角（Jeanit），因为它的[[顶点]]在圆周上，于是就将其更名为圆周角。

顶点在圆上，并且两边都和圆相交的角叫做圆周角，这一定义实质上反映的是圆周角所具备的两个[[特征]]：①顶点在圆上，②两边都和圆相交。这两个条件缺一不可。<ref>[https://wenku.baidu.com/view/c82fb662ddccda38376baf0a.html 圆周角定理 ],百度 , 2011-05-23</ref>