CSS border-radius aprenderaprogramar.com
border-radius: 5px;
border-radius: 10px;
border-radius: 20px;
border-radius: 40px;
border-radius: 60px;
border-radius: 13em/3em;
border-top-left-radius: 40%; sadasdas
border-radius: 80px 20px;
border-radius: 60px 20px 5px;
border-radius: 60px 20px 5px 90px;
border-radius: 60px/20px;
border-radius: 50%;