Use the border-bottom-left-radius property to set the border of the bottom left corner. You can try to run the following code to implement the border-bottom-left-radius property
Example
<html>
<head>
<style>
#rcorner {
border-radius: 25px;
border-bottom-left-radius: 45px;
background: blue;
padding: 20px;
width: 200px;
height: 150px;
}
</style>
</head>
<body>
<p id = "rcorner">Rounded corners!</p>
</body>
</html>