代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>画三角形</title>
<style>
??#trip{
??width:0px;
??height:0px;
??border-top:50px solid white;
??border-right:50px solid white;
??border-bottom:50px solid green;
??border-left:50px solid white;
??}
</style>
</head>
<body>
<div id="trip">
</div>
</body>
</html>
效果如图显示:
css趣味案例：画三角形
原文地址：https://www.cnblogs.com/itfz/p/9901543.html