How Can I Create a Circle Using HTML and CSS?

Drawing Circles on an HTML Page

Creating a circular element using HTML5 and CSS3 is not directly possible. However, a technique can be employed to create an element that visually resembles a circle.

Creating a Rounded Rectangle

The key to simulating a circle is to create a rectangle with rounded corners. The border-radius property in CSS allows us to define the curvature of the corners.

Determining the Radius

To achieve a perfect circle, the border-radius value should be equal to half the width or height of the rectangle. This ensures that the corners are curved inward sufficiently to create the impression of a circle.

Example Code

Consider the following code snippet that creates a circular element:

<div>

#circle {
  width: 50px;
  height: 50px;
  -webkit-border-radius: 25px;
  -moz-border-radius: 25px;
  border-radius: 25px;
  background: red;
}

In this example, we create a rectangle with a width and height of 50 pixels. The border-radius value is set to 25 pixels, which is half the width/height of the rectangle. This produces a circle-like shape with red fill.

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