title: Easiest way to change scale of a Cesium.Rectangle?
body: <p>I want to create a Cesium Rectangle that contains a list of points but is maybe 20% larger in all directions than needed.  What is the easiest way to do that?</p>
  
  <pre><code>var rectangle = Cesium.Rectangle.fromCartographicArray(arrayOfCartos);
  ...how to make rectangle bigger?
  </code></pre>