title: Adding border to CSS triangle
body: <p>I have a triangle</p>
  
  <pre><code>&lt;div class="triangle-left"&gt;&lt;/div&gt;
  
  
  .triangle-left {
      width: 0; 
      height: 0; 
      border-top: 22px solid transparent;
      border-bottom: 22px solid transparent;
      border-right: 22px solid white;
  }
  </code></pre>
  
  <p>How do I draw the outline of a CSS triangle, considering <code>border</code> itself is used to make the triangle? External divs?</p>