y
                    </p>
                  </td>
<td>
                    <p>
                      A model of the specified concept
                    </p>
                  </td>
</tr></tbody>
</table></div>
<h6>
<a name="geometry.reference.algorithms.area.area_1.h3"></a>
            <span><a name="geometry.reference.algorithms.area.area_1.returns"></a></span><a class="link" href="area_1.html#geometry.reference.algorithms.area.area_1.returns">Returns</a>
          </h6>
<p>
            The calculated a