clip-path-path()

Codice
<style>
.path-clip {
width: 300px;
height: 200px;
background-image: url('Algoritmo.jpg');
clip-path: path('M50 0 L100 100 L0 100 Z');
/* Triangolo */
}
</style>
</head>
<body>
<a href="#" onClick="window.history.go(-1);">Home</a>
<div class="path-clip"></div>