fix geometry tutorial
diff --git a/doc/C08_TutorialGeometry.dox b/doc/C08_TutorialGeometry.dox
index b9e9eba..6bce2ee 100644
--- a/doc/C08_TutorialGeometry.dox
+++ b/doc/C08_TutorialGeometry.dox
@@ -178,7 +178,7 @@
 \endcode</td></tr>
 <tr><td>
 extract the rotation matrix</td><td>\code
-matNxN = t.extractRotation();
+matNxN = t.rotation();
 \endcode</td></tr>
 </table>