13.制作一个直角三角形

使用div元素制作一个三角形:

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- reset.css文件内容参考:https://www.cnblogs.com/lanshanxiao/p/12663192.html -->
    <link rel="stylesheet" href="./reset.css">
    <style>
        div{
            width:0;
            height:0;
            border:20px solid transparent;
            border-right-color: #000;
        }
    </style>
</head>

<body>
    <div>
    </div>
</body>

</html>
index.html

效果展示:

原文地址:https://www.cnblogs.com/lanshanxiao/p/12719758.html