css绘制特殊图形基础

.isosceles{
 width: 0;
 height: 0;
 border:30px solid;
 border-left-color: transparent;
 border-right-color: transparent;
 border-top-color: transparent;
 border-bottom-color: red;
}

2.直角三角形

.right{
 width: 0;
 height: 0;
 border:30px solid;
 border-left: 0;
 border-right-color: transparent;
 border-top: 0;
 border-bottom-color: red;
}

3.圆

.round{
 width: 100px;
 height: 100px;
 background-color: red;
 border-radius:50%; 
}

4.椭圆

.ellipse{
 width: 100px;
 height: 80px;
 background-color: red;
 border-radius:50%; 
}