title: oval shape in flutter
body: <p>I'm trying to create Oval shape by using <code>Radius.circular</code> but it looks like circular shape and I have also tried to change <code>Radius.elliptical</code> but still getting a different shape.</p>
  
  <pre><code>  Expanded(
              flex: 13,
              child:  Container(
                height: 100,
                width:100,
                margin: EdgeInsets.only(top: 40,left: 40,right: 40),
                decoration: new BoxDecoration(
                  color: MyColors.colorPrimary,
                  border: Border.all(color: Colors.black, width: 0.0),
                  borderRadius:
                  new BorderRadius.all(Radius.elliptical(90,45)),
                ),
                child: Text('     '),
              ),
  </code></pre>
  
  <p>I want this</p>
  
  <p><a href="https://i.stack.imgur.com/7hCK0.png" rel="noreferrer"><img src="https://i.stack.imgur.com/7hCK0.png" alt="enter image description here"></a></p>
  
  <p>but getting this</p>
  
  <p><a href="https://i.stack.imgur.com/mpeVu.png" rel="noreferrer"><img src="https://i.stack.imgur.com/mpeVu.png" alt="enter image description here"></a></p>