En la actualidad añadir formas geométricas al desarrollo de una pagina web es mucho mas fácil y esto consume mucho menos espacio en nuestro servidor.
Por lo cual hoy en día con la ayuda de CSS3 los podremos realizar directamente escribiendo un poco de css la cual hacia falta en CSS2.
proseguiremos a ver formas las cuales se pueden realizar de forma muy sencilla.
<div class="oval-half-red"></div> .oval-half-red { width: 250px; height: 100px; -moz-border-radius: 0 50% / 0 100%; -webkit-border-radius: 0 50% / 0 100%; border-radius: 0 50% / 0 100%; background: #5cb85c; border: 3px solid #555; }
<div id="square"></div> #square { width: 100px; height: 100px; background: red; }
<div id="rectangle"></div> #rectangle { width: 200px; height: 100px; background: red; }
<div id="circle"></div> #circle { width: 100px; height: 100px; background: red; -moz-border-radius: 50px; -webkit-border-radius: 50px; border-radius: 50px; }
<div id="oval"></div> #oval { width: 200px; height: 100px; background: red; -moz-border-radius: 100px / 50px; -webkit-border-radius: 100px / 50px; border-radius: 100px / 50px; }
<div id="triangle-up"></div> #triangle-up { width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-bottom: 100px solid red; }
<div id="triangle-down"></div> #triangle-down { width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-top: 100px solid red; }
<div id="triangle-left"></div> #triangle-left { width: 0; height: 0; border-top: 50px solid transparent; border-right: 100px solid red; border-bottom: 50px solid transparent; }
<div id="triangle-right"></div> #triangle-right { width: 0; height: 0; border-top: 50px solid transparent; border-left: 100px solid red; border-bottom: 50px solid transparent; }
<div id="triangle-topleft"></div> #triangle-topleft { width: 0; height: 0; border-top: 100px solid red; border-right: 100px solid transparent; }
<div id="triangle-topright"></div> #triangle-topright { width: 0; height: 0; border-top: 100px solid red; border-left: 100px solid transparent; }
<div id="triangle-bottomleft"></div> #triangle-bottomleft { width: 0; height: 0; border-bottom: 100px solid red; border-right: 100px solid transparent; }
<div id="triangle-bottomright"></div> #triangle-bottomright { width: 0; height: 0; border-bottom: 100px solid red; border-left: 100px solid transparent; }
<div id="curvedarrow"></div> #curvedarrow { position: relative; width: 0; height: 0; border-top: 9px solid transparent; border-right: 9px solid red; -webkit-transform: rotate(10deg); -moz-transform: rotate(10deg); -ms-transform: rotate(10deg); -o-transform: rotate(10deg); } #curvedarrow:after { content: ""; position: absolute; border: 0 solid transparent; border-top: 3px solid red; border-radius: 20px 0 0 0; top: -12px; left: -9px; width: 12px; height: 12px; -webkit-transform: rotate(45deg); -moz-transform: rotate(45deg); -ms-transform: rotate(45deg); -o-transform: rotate(45deg); }
<div id="trapezoid"></div> #trapezoid { border-bottom: 100px solid red; border-left: 50px solid transparent; border-right: 50px solid transparent; height: 0; width: 100px; }
<div id="parallelogram"></div> #parallelogram { width: 150px; height: 100px; -webkit-transform: skew(20deg); -moz-transform: skew(20deg); -o-transform: skew(20deg); background: red; }
<div id="star-six"></div> #star-six { width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-bottom: 100px solid red; position: relative; } #star-six:after { width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-top: 100px solid red; position: absolute; content: ""; top: 30px; left: -50px; }
<div id="star-five"></div> #star-five { margin: 50px 0; position: relative; display: block; color: red; width: 0px; height: 0px; border-right: 100px solid transparent; border-bottom: 70px solid red; border-left: 100px solid transparent; -moz-transform: rotate(35deg); -webkit-transform: rotate(35deg); -ms-transform: rotate(35deg); -o-transform: rotate(35deg); } #star-five:before { border-bottom: 80px solid red; border-left: 30px solid transparent; border-right: 30px solid transparent; position: absolute; height: 0; width: 0; top: -45px; left: -65px; display: block; content: ''; -webkit-transform: rotate(-35deg); -moz-transform: rotate(-35deg); -ms-transform: rotate(-35deg); -o-transform: rotate(-35deg); } #star-five:after { position: absolute; display: block; color: red; top: 3px; left: -105px; width: 0px; height: 0px; border-right: 100px solid transparent; border-bottom: 70px solid red; border-left: 100px solid transparent; -webkit-transform: rotate(-70deg); -moz-transform: rotate(-70deg); -ms-transform: rotate(-70deg); -o-transform: rotate(-70deg); content: ''; }
<div id="pentagon"></div> #pentagon { position: relative; width: 54px; border-width: 50px 18px 0; border-style: solid; border-color: red transparent; } #pentagon:before { content: ""; position: absolute; height: 0; width: 0; top: -85px; left: -18px; border-width: 0 45px 35px; border-style: solid; border-color: transparent transparent red; }
<div id="hexagon"></div> #hexagon { width: 100px; height: 55px; background: red; position: relative; } #hexagon:before { content: ""; position: absolute; top: -25px; left: 0; width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-bottom: 25px solid red; } #hexagon:after { content: ""; position: absolute; bottom: -25px; left: 0; width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-top: 25px solid red; }
<div id="octagon"></div> #octagon { width: 100px; height: 100px; background: red; position: relative; } #octagon:before { content: ""; position: absolute; top: 0; left: 0; border-bottom: 29px solid red; border-left: 29px solid #eee; border-right: 29px solid #eee; width: 42px; height: 0; } #octagon:after { content: ""; position: absolute; bottom: 0; left: 0; border-top: 29px solid red; border-left: 29px solid #eee; border-right: 29px solid #eee; width: 42px; height: 0; }
<div id="heart"></div> #heart { position: relative; width: 100px; height: 90px; } #heart:before, #heart:after { position: absolute; content: ""; left: 50px; top: 0; width: 50px; height: 80px; background: red; -moz-border-radius: 50px 50px 0 0; border-radius: 50px 50px 0 0; -webkit-transform: rotate(-45deg); -moz-transform: rotate(-45deg); -ms-transform: rotate(-45deg); -o-transform: rotate(-45deg); transform: rotate(-45deg); -webkit-transform-origin: 0 100%; -moz-transform-origin: 0 100%; -ms-transform-origin: 0 100%; -o-transform-origin: 0 100%; transform-origin: 0 100%; } #heart:after { left: 0; -webkit-transform: rotate(45deg); -moz-transform: rotate(45deg); -ms-transform: rotate(45deg); -o-transform: rotate(45deg); transform: rotate(45deg); -webkit-transform-origin: 100% 100%; -moz-transform-origin: 100% 100%; -ms-transform-origin: 100% 100%; -o-transform-origin: 100% 100%; transform-origin :100% 100%; }
<div id="infinity"></div> #infinity { position: relative; width: 212px; height: 100px; } #infinity:before, #infinity:after { content: ""; position: absolute; top: 0; left: 0; width: 60px; height: 60px; border: 20px solid red; -moz-border-radius: 50px 50px 0 50px; border-radius: 50px 50px 0 50px; -webkit-transform: rotate(-45deg); -moz-transform: rotate(-45deg); -ms-transform: rotate(-45deg); -o-transform: rotate(-45deg); transform: rotate(-45deg); } #infinity:after { left: auto; right: 0; -moz-border-radius: 50px 50px 50px 0; border-radius: 50px 50px 50px 0; -webkit-transform: rotate(45deg); -moz-transform: rotate(45deg); -ms-transform: rotate(45deg); -o-transform: rotate(45deg); transform: rotate(45deg); }
<div id="diamond"></div> #diamond { width: 0; height: 0; border: 50px solid transparent; border-bottom-color: red; position: relative; top: -50px; } #diamond:after { content: ''; position: absolute; left: -50px; top: 50px; width: 0; height: 0; border: 50px solid transparent; border-top-color: red; }
<div id="diamond-shield"></div> #diamond-shield { width: 0; height: 0; border: 50px solid transparent; border-bottom: 20px solid red; position: relative; top: -50px; } #diamond-shield:after { content: ''; position: absolute; left: -50px; top: 20px; width: 0; height: 0; border: 50px solid transparent; border-top: 70px solid red; }
<div id="diamond-narrow"></div> #diamond-narrow { width: 0; height: 0; border: 50px solid transparent; border-bottom: 70px solid red; position: relative; top: -50px; } #diamond-narrow:after { content: ''; position: absolute; left: -50px; top: 70px; width: 0; height: 0; border: 50px solid transparent; border-top: 70px solid red; }
<div id="cut-diamond"></div> #cut-diamond { border-style: solid; border-color: transparent transparent red transparent; border-width: 0 25px 25px 25px; height: 0; width: 50px; position: relative; margin: 20px 0 50px 0; } #cut-diamond:after { content: ""; position: absolute; top: 25px; left: -25px; width: 0; height: 0; border-style: solid; border-color: red transparent transparent transparent; border-width: 70px 50px 0 50px; }
<div id="egg"></div> #egg { display:block; width: 126px; height: 180px; background-color: red; -webkit-border-radius: 63px 63px 63px 63px / 108px 108px 72px 72px; border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%; }
<div id="pacman"></div> #pacman { width: 0px; height: 0px; border-right: 60px solid transparent; border-top: 60px solid red; border-left: 60px solid red; border-bottom: 60px solid red; border-top-left-radius: 60px; border-top-right-radius: 60px; border-bottom-left-radius: 60px; border-bottom-right-radius: 60px; }
<div id="talkbubble"></div> #talkbubble { width: 120px; height: 80px; background: red; position: relative; -moz-border-radius: 10px; -webkit-border-radius: 10px; border-radius: 10px; } #talkbubble:before { content:""; position: absolute; right: 100%; top: 26px; width: 0; height: 0; border-top: 13px solid transparent; border-right: 26px solid red; border-bottom: 13px solid transparent; }
<div id="burst-12"></div> #burst-12 { background: red; width: 80px; height: 80px; position: relative; text-align: center; } #burst-12:before, #burst-12:after { content: ""; position: absolute; top: 0; left: 0; height: 80px; width: 80px; background: red; } #burst-12:before { -webkit-transform: rotate(30deg); -moz-transform: rotate(30deg); -ms-transform: rotate(30deg); -o-transform: rotate(30deg); } #burst-12:after { -webkit-transform: rotate(60deg); -moz-transform: rotate(60deg); -ms-transform: rotate(60deg); -o-transform: rotate(60deg); }
<div id="burst-8"></div> #burst-8 { background: red; width: 80px; height: 80px; position: relative; text-align: center; -webkit-transform: rotate(20deg); -moz-transform: rotate(20deg); -ms-transform: rotate(20deg); -o-transform: rotate(20eg); } #burst-8:before { content: ""; position: absolute; top: 0; left: 0; height: 80px; width: 80px; background: red; -webkit-transform: rotate(135deg); -moz-transform: rotate(135deg); -ms-transform: rotate(135deg); -o-transform: rotate(135deg); }
<div id="yin-yang"></div> #yin-yang { width: 96px; height: 48px; background: #eee; border-color: red; border-style: solid; border-width: 2px 2px 50px 2px; border-radius: 100%; position: relative; } #yin-yang:before { content: ""; position: absolute; top: 50%; left: 0; background: #eee; border: 18px solid red; border-radius: 100%; width: 12px; height: 12px; } #yin-yang:after { content: ""; position: absolute; top: 50%; left: 50%; background: red; border: 18px solid #eee; border-radius:100%; width: 12px; height: 12px; }
<div id="badge-ribbon"></div> #badge-ribbon { position: relative; background: red; height: 100px; width: 100px; -moz-border-radius: 50px; -webkit-border-radius: 50px; border-radius: 50px; } #badge-ribbon:before, #badge-ribbon:after { content: ''; position: absolute; border-bottom: 70px solid red; border-left: 40px solid transparent; border-right: 40px solid transparent; top: 70px; left: -10px; -webkit-transform: rotate(-140deg); -moz-transform: rotate(-140deg); -ms-transform: rotate(-140deg); -o-transform: rotate(-140deg); } #badge-ribbon:after { left: auto; right: -10px; -webkit-transform: rotate(140deg); -moz-transform: rotate(140deg); -ms-transform: rotate(140deg); -o-transform: rotate(140deg); }
<div id="space-invader"></div> #space-invader{ box-shadow: 0 0 0 1em red, 0 1em 0 1em red, -2.5em 1.5em 0 .5em red, 2.5em 1.5em 0 .5em red, -3em -3em 0 0 red, 3em -3em 0 0 red, -2em -2em 0 0 red, 2em -2em 0 0 red, -3em -1em 0 0 red, -2em -1em 0 0 red, 2em -1em 0 0 red, 3em -1em 0 0 red, -4em 0 0 0 red, -3em 0 0 0 red, 3em 0 0 0 red, 4em 0 0 0 red, -5em 1em 0 0 red, -4em 1em 0 0 red, 4em 1em 0 0 red, 5em 1em 0 0 red, -5em 2em 0 0 red, 5em 2em 0 0 red, -5em 3em 0 0 red, -3em 3em 0 0 red, 3em 3em 0 0 red, 5em 3em 0 0 red, -2em 4em 0 0 red, -1em 4em 0 0 red, 1em 4em 0 0 red, 2em 4em 0 0 red; background: red; width: 1em; height: 1em; overflow: hidden; margin: 50px 0 70px 65px; }
<div id="tv"></div> #tv { position: relative; width: 200px; height: 150px; margin: 20px 0; background: red; border-radius: 50% / 10%; color: white; text-align: center; text-indent: .1em; } #tv:before { content: ''; position: absolute; top: 10%; bottom: 10%; right: -5%; left: -5%; background: inherit; border-radius: 5% / 50%; }
<div id="chevron"></div> #chevron { position: relative; text-align: center; padding: 12px; margin-bottom: 6px; height: 60px; width: 200px; } #chevron:before { content: ''; position: absolute; top: 0; left: 0; height: 100%; width: 51%; background: red; -webkit-transform: skew(0deg, 6deg); -moz-transform: skew(0deg, 6deg); -ms-transform: skew(0deg, 6deg); -o-transform: skew(0deg, 6deg); transform: skew(0deg, 6deg); } #chevron:after { content: ''; position: absolute; top: 0; right: 0; height: 100%; width: 50%; background: red; -webkit-transform: skew(0deg, -6deg); -moz-transform: skew(0deg, -6deg); -ms-transform: skew(0deg, -6deg); -o-transform: skew(0deg, -6deg); transform: skew(0deg, -6deg); }
<div id="magnifying-glass"></div> #magnifying-glass { font-size: 10em; /* This controls the size. */ display: inline-block; width: 0.4em; height: 0.4em; border: 0.1em solid red; position: relative; border-radius: 0.35em; } #magnifying-glass::before { content: ""; display: inline-block; position: absolute; right: -0.25em; bottom: -0.1em; border-width: 0; background: red; width: 0.35em; height: 0.08em; -webkit-transform: rotate(45deg); -moz-transform: rotate(45deg); -ms-transform: rotate(45deg); -o-transform: rotate(45deg); }
<div id="facebook-icon"></div> #facebook-icon { background: red; text-indent: -999em; width: 100px; height: 110px; border-radius: 5px; position: relative; overflow: hidden; border: 15px solid red; border-bottom: 0; } #facebook-icon::before { content: "/20"; position: absolute; background: red; width: 40px; height: 90px; bottom: -30px; right: -37px; border: 20px solid #eee; border-radius: 25px; } #facebook-icon::after { content: "/20"; position: absolute; width: 55px; top: 50px; height: 20px; background: #eee; right: 5px; }
<div id="cone"></div> #cone { width: 0; height: 0; border-left: 70px solid transparent; border-right: 70px solid transparent; border-top: 100px solid red; -moz-border-radius: 50%; -webkit-border-radius: 50%; border-radius: 50%; }
<div id="moon"></div> #moon { width: 80px; height: 80px; border-radius: 50%; box-shadow: 15px 15px 0 0 red; }
<div id="flag"></div> #flag { width: 110px; height: 56px; padding-top: 15px; position: relative; background: red; color: white; font-size: 11px; letter-spacing: 0.2em; text-align: center; text-transform: uppercase; } #flag:after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 0; border-bottom: 13px solid #eee; border-left: 55px solid transparent; border-right: 55px solid transparent; }
<div id="cross"></div> #cross { background: red; height: 100px; position: relative; width: 20px; } #cross:after { background: red; content: ""; height: 20px; left: -40px; position: absolute; top: 40px; width: 100px; }
<div id="base"></div> #base { background: red; display: inline-block; height: 55px; margin-left: 20px; margin-top: 55px; position: relative; width: 100px; } #base:before { border-bottom: 35px solid red; border-left: 50px solid transparent; border-right: 50px solid transparent; content: ""; height: 0; left: 0; position: absolute; top: -35px; width: 0; }