<!DOCTYPE html>
<html>

  <head>
    <script data-require="angular.js@1.5.3" data-semver="1.4.8" src="https://code.angularjs.org/1.4.8/angular.js"></script>
    <script data-require="angular-resource@1.4.8" data-semver="1.4.8" src="https://code.angularjs.org/1.4.8/angular-resource.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/angular-chart.js/0.10.2/angular-chart.js"></script>
    <link rel="stylesheet" href="style.css" />
    <script src="script.js"></script>
  </head>

  <body ng-app="app">
    <h1>Charts</h1>
    <div ng-controller="DemoController">
      <canvas id="pie" class="chart chart-pie" chart-data="data" chart-labels="labels"></canvas>
    </div>
  </body>
</html>
// Code goes here

(function(){
angular.module("app", ["chart.js"]);
angular.module("app").controller("DemoController", DemoController);

function DemoController ($scope) {
  $scope.labels = ["Download Sales", "In-Store Sales", "Mail-Order Sales"];
  $scope.data = [300, 500, 100];
}  
})();
/* Styles go here */

Simple example of Charts.js and AngularJs