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<!DOCTYPE html> <html> <head> <title>Font Awesome Icons</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="../../cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"> </head> <body> <h1>fa fa-exclamation-triangle</h1> <i class="fa fa-exclamation-triangle"></i> <i class="fa fa-exclamation-triangle" style="font-size:24px"></i> <i class="fa fa-exclamation-triangle" style="font-size:36px"></i> <i class="fa fa-exclamation-triangle" style="font-size:48px;color:red"></i> <br> <p>Used on a button:</p> <button style="font-size:24px">Button <i class="fa fa-exclamation-triangle"></i></button> <p>Unicode:</p> <i style="font-size:24px" class="fa"></i> </body> </html>