   <span class="bold"><strong>two and related</strong></span>
              </p>
            </td>
<td>
            </td>
<td>
            </td>
<td>
            </td>
</tr>
<tr>
<td>
              <p>
                root_two
              </p>
            </td>
<td>
              <p>
                √2
              </p>
            </td>
<td>
              <p>
                1.41421
              </p>
            </td>
<td>
              <p>
                Equivalent to POSIX constant M_SQRT2
       