index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Pizza Area Calculator</title>
    <link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
    <link async href="https://fonts.googleapis.com/css?family=Passero%20One" data-generated="http://enjoycss.com" rel="stylesheet" type="text/css"/>

    <!--<script src="js/angular.min.js"></script>-->
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.min.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/angular-ui-router/0.2.8/angular-ui-router.min.js"></script>
    <script src="app.js"></script>

    <script>

    </script>

</head>
<body ng-app="pizzaareaApp">

<h1 class="text-center">Pizza Area Calculator</h1>

    <div class="container">
        <div ui-view>
        </div>
    </div>

</body>
</html>