老师，帮忙看下代码

来源：2-11 编程练习

慕瓜2033872

2021-04-27 16:05:28

相关代码：

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>边框</title>
    <style>
        /*补充代码*/
        .bd1{
            width:0;
            height:0;
            border:50px solid transparent;
            border-left-color:red;
            float:left;
            border-top-left-radius:40%;
            border-bottom-left-radius:40%;
        }
        .bd2{
            width:0;
            height:0;
            border:50px solid transparent;
            border-right-color:red;
            float:left;
            margin-left:-120px;
            border-top-right-radius:40%;
            border-bottom-right-radius:40%
        }

    </style>
</head>

<body>
    <div class="box">
        <div class="bd1"></div>
        <div class="bd2"></div>
    </div>
</body>

</html>