a_sphere" target="_top">volume
                of a hemi-sphere</a> = 4/3 π r³
              </p>
            </td>
</tr>
<tr>
<td>
              <p>
                three_quarters_pi
              </p>
            </td>
<td>
              <p>
                3/4 π
              </p>
            </td>
<td>
              <p>
                2.35619
              </p>
            </td>
<td>
              <p>
                = 3/4 π
              </p>
            </td>
</tr>
<tr>
<td>
              <p>
   