CSS Challenge: Can't get an image to be round!

Hi guys! I’m currently following the Front-End Engineer Career Path, and the last lesson in the Learn CSS: Typography is the CSS challenges. In these challenges, they ask me to make an image round, which we never learned how to do until now?! Is this something I’m just missing? Is this an error or am I supposed to look for this on Google or something??
Thanks and sorry for the total noob question!


I think they covered the border-radius property, but may not have specified exactly how to make a circle with it. Here’s a good article about it if you’d like: CSS Tricks - Border Radius

Also, no need to apologize for asking questions!