Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

CSS CSS Foundations Backgrounds and Borders Border Radius

No idea.

Please help me understand this problem :) Using the border-radius shorthand, give each corner of the .oval div a horizontal radius of 100px and a vertical radius of 50px.

<!DOCTYPE html>
    <link rel="stylesheet" type="text/css" href="page.css">
    <link rel="stylesheet" href="style.css">
    <div class="rounded box"></div>
    <div class="oval box"></div>
/* Complete the challenge by writing CSS below */

.rounded {
  border-radius: 30px;


.oval {


2 Answers

Mikael Enarsson
Mikael Enarsson
7,056 Points

You can give a horizontal and a vertical component of the radius by:

border-radius: [horizontal radius]/[vertical radius];

Hey Reggie,

Your code should look like this:

.oval {
  border-radius: 100px / 50px;