CodePudding user response：

Try the following code:

Container(
  height: 100.0,
  width: 100.0,
  decoration: BoxDecoration(
    color: Colors.orange[100],
    borderRadius: const BorderRadius.only(
      topLeft: Radius.circular(15.0),
      topRight: Radius.circular(15.0),
      bottomLeft: Radius.circular(100.0),
      bottomRight: Radius.circular(5.0),
    ),
  ),
),