<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>四分之一圆</title>
<style>
/*画四分之一圆*/
.yuan1{
width:200px;
height:200px;
border-radius:0 100% 0 100%;
background:#F00;
}
.yuan2{
width:200px;
height:200px;
border-radius:100% 0 0 0;
background:green;
}
.yuan3{
width:200px;
height:200px;
border-radius:0 100% 0 0;
background:#234edc;
}
.yuan4{
width:200px;
height:200px;
border-radius:0 0 100% 0;
background:#F0f;
}
.yuan5{
width:200px;
height:200px;
border-radius:0 0 0 100%;
background:#Ff0;
}
.yuan6{
width:100px;
height:100px;
border-radius:100% 100% 0 0;
background:#Ff0;
}
.yuan7{
width:200px;
height:200px;
border-radius:100% 0 100% 0;
background:#00F;
}
.yuan8{
width:200px;
height:100px;
border-radius:100px 0 100px 0;
background:#00F;
}
.yuan9{
width:200px;
height:100px;
border-radius:100px 100px 0 0;
background:#ff6633;
}
</style>
</head>
<body style="background:#000;">
<div class="yuan1"></div>
<div class="yuan2"></div>
<div class="yuan3"></div>
<div class="yuan4"></div>
<div class="yuan5"></div>
<div class="yuan6"></div>
<div class="yuan7"></div>
<div class="yuan8"></div>
<div class="yuan9"></div>
</body>
</html>