1.等腰三角形 2.直角三角形 3.圓 4.橢圓 ...
1.等腰三角形
.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.圓
.round{ width: 100px; height: 100px; background-color: red; border-radius:50%; }
4.橢圓
.ellipse{ width: 100px; height: 80px; background-color: red; border-radius:50%; }