Drawing rounded triangle with CSS

http://stackoverflow.com/questions/11913645/drawing-rounded-triangle-with-css

HTML

<div>abc</div>

CSS

div {
    transform: rotate(45deg);
    -ms-transform: rotate(45deg); /* IE 9 */
    -webkit-transform: rotate(45deg); /* Safari and Chrome */
    -o-transform: rotate(45deg); /* Opera */
    -moz-transform: rotate(45deg); /* Firefox */
    background-color:green;
    width:100px;
    height:100px;
    position:absolute;
    top:20px;
    left:-50px;
    -webkit-border-radius: 0 20px 0 0;
    -moz-border-radius: 0 20px 0 0;
    border-radius: 0 20px 0 0;
}