title: Why can't I make a circle with border-radius?
body: <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>* {
    margin: 0;
  }
  
  div {
    background-color: green;
    height: 900px;
    width: 50%;
    margin: auto;
    border-radius: 50px;
    overflow: hidden;
    padding: 20px;
    border: 4px solid red;
    box-sizing: border-box;
  }
  
  div:hover {
    box-shadow: 5px 5px 5px 1px blue;
  }
  
  @media screen and (max-width:600px) {
    div {
      background-color: aqua;
      color: red;
      width: 100%;
      height: 10%;
    }
    body {
      background-color: chocolate
    }
  }
  
  .divas {
    background-color: yellow;
    position: relative;
    margin-top: 20%;
    height: 300px;
    border-radius: 50%;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div&gt;This is text . This is text . This is text . This is text . This is text . This is text . This is text . This is text . This is text . This is text . This is text . This is text . &lt;/div&gt;
  &lt;div class="divas"&gt;&lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Hello I would like to make a perfectly rounded circle. I tried creating it with border-radius , but it doesn't allow me to create a perfect circle. Can someone explain me why? I tried changing padding and such but it doesn't work anyways.? Thanks in advance.</p>