如何用css3實現一個扇形？

思路跟畫實體三角形一個道理,只不過多了一個圓角屬性

代碼如下：

<! DOCTYPE  html>

< html  lang= "en" >

< head >

     < meta  charset= "UTF-8" >

     < meta  name= "viewport"  content= "width=device-width, initial-scale=1.0" >

     < meta  http-equiv= "X-UA-Compatible"  content= "ie=edge" >

     < title >c3扇形 </ title >

     < style >

         .sector {

             width :  0 ;

             height :  0 ;

             border-width :  50 px ;

             border-style : solid;

             border-color :  #f00  transparent transparent;

             border-radius :  50 px

        }

     < / style >

</ head >

< body >

     < div  class= "sector" ></ div >

</ body >

</ html >