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