div制作三角形
DOCTYPE html>
<html>
<head>
<style>
* {margin: 0;}
.demo{background-color: aquamarine;
padding: 1px;
height: 300px;}
.demo>div{width: 0px;
height: 0px;
margin: 100px;
border-style: solid;
border-width: 50px 0 50px 120px;
border-color: transparent transparent transparent red;
}
style>
head>
<body>
<div class="demo">
<div>div>
div>
body>
html>