         
                    Doughnut & Pie
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="1.5.5" data-path="../../charts/polar.html">
            
                <a href="../../charts/polar.html">
            
                    
                    Polar Area
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="1.5.6" data-path="../../charts/bubble.html">
       