level 2
飞毛腿苹果
楼主
<!DOCTYPE html><html lang="en">
<head>
<meta charset="UTF-8">
<title>三角形</title>
<style>
.box1{
margin: 40px auto;
border: 30px solid transparent;
width: 1px;
height: 1px;
border-bottom: 30px solid red;
}
.box2{
margin: 40px auto;
border: 30px solid transparent;
width: 1px;
height: 1px;
border-left: 30px solid red;
border-bottom: 30px solid red;
}
</style>
</head>
<body>
<div class="box1"></div>
<div class="box2"></div>
</body>
</html>