html学习笔记4-border画圣诞树

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先上图：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>用css控制border画三角形</title>
<style>
div{
width:200px;
height:200px;
background-color:auto;
}
.triangle{
width:0px;
height:0px;/*这里的数控制border中心方块的大小*/

border-top:0px solid;
border-left:100px solid;
border-bottom:100px solid;
border-right:100px solid;
border-color:transparent transparent #090 transparent;
/*transparent设置边框颜色为透明*/
}
.triangle1{
width:0px;
height:0px;/*这里的数控制border中心方块的大小*/

border-top:0px solid;
border-left:100px solid;
border-bottom:100px solid;
border-right:100px solid;
border-color:transparent transparent #090 transparent;
/*transparent设置边框颜色为透明*/
margin-top:-20px;/*距离顶部的距离*/
}
#sg{
width:50px;
height:60px;
background-color:#630;
margin:0px 80px;

}
</style>
</head>
<body>
<div>
<div class="triangle"></div>
<div class="triangle1"></div>
<div class="triangle1"></div>
<div id="sg"></div>
</div>
</body>
</html>

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