><a name="geometry.reference.core.radian.synopsis"></a></span><a class="link" href="radian.html#geometry.reference.core.radian.synopsis">Synopsis</a>
        </h6>
<p>
</p>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">radian</span>
<span class="special">{</span>
  <span class="comment">// ...</span>
<span class="special">};</span>
</pre>
<p>
        </p>
<h6>
<a name="geometry.reference.core.radian.h2"></a>
          <span class="phrase"><a name="geometry.referenc