CSS 画三角形、圆

 

 1         <div class="square"></div>
 2         <style>
 3             .square {
 4                 height: 0px;
 5                 width: 0px;
 6                 border-bottom: 50px solid #006633;
 7                 border-left: 50px solid transparent;
 8                 border-right: 50px solid transparent;
 9             }
10         </style>

三角形