檢視圆心角的原始碼

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|<center><img src=https://gimg2.baidu.com/image_search/src=http%3A%2F%2Ftxt39-1.book118.com%2F2017%2F1101%2Fbook138453%2F138452314.jpg&refer=http%3A%2F%2Ftxt39-1.book118.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1653860945&t=56cdca6aa8184ed02c3bc4a7dd62bbc8 width="300"></center>
<small>[https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%9C%86%E5%BF%83%E8%A7%92&step_word=&hs=0&pn=15&spn=0&di=7077213605308923905&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=192013819%2C1979518271&os=2348570678%2C2646899986&simid=192013819%2C1979518271&adpicid=0&lpn=0&ln=1840&fr=&fmq=1651268915995_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Ftxt39-1.book118.com%2F2017%2F1101%2Fbook138453%2F138452314.jpg%26refer%3Dhttp%3A%2F%2Ftxt39-1.book118.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Dauto%3Fsec%3D1653860945%26t%3D56cdca6aa8184ed02c3bc4a7dd62bbc8&fromurl=ippr_z2C%24qAzdH3FAzdH3F4wx_z%26e3Bk55h88b_z%26e3Bv54AzdH3Fip4sAzdH3Fda80AzdH3F88a8AzdH3F8nb9cdn89_z%26e3Bfip4&gsm=c&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined&dyTabStr=MCwyLDYsMyw1LDEsNCw3LDgsOQ%3D%3D 来自 呢图网 的图片]</small>
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中文名；圆心角

外文名；central angle

顶点；在圆心上

两边；与圆周相交

范围；0°＜x度＜360°

学科；数学
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'''圆心角'''是指在中心为O的圆中，过弧AB两端的半径构成的∠AOB，  称为弧AB所对的[[圆心角]]。圆心角等于同一弧所对的圆周角的二倍。<ref>[https://wenku.baidu.com/view/85b8503f964bcf84b8d57b18.html 圆心角的概念],百度 , 2018年7月2日</ref>