diff --git a/src/userguide/java/org/apache/commons/math3/userguide/geometry/ConvexHullExample.java b/src/userguide/java/org/apache/commons/math3/userguide/geometry/ConvexHullExample.java
index 328d21e36..410605cbe 100644
--- a/src/userguide/java/org/apache/commons/math3/userguide/geometry/ConvexHullExample.java
+++ b/src/userguide/java/org/apache/commons/math3/userguide/geometry/ConvexHullExample.java
@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.apache.commons.math3.userguide.geometry;
 
 import java.awt.Color;
@@ -49,7 +65,7 @@ public class ConvexHullExample {
             
             setLayout(new FlowLayout());
             
-            ConvexHullGenerator2D generator = new MonotoneChain();
+            ConvexHullGenerator2D generator = new MonotoneChain(true);
             Collection<Vector2D> cloud = createRandomPoints(150);
             ConvexHull2D hull = generator.generate(cloud);
 
diff --git a/src/userguide/java/org/apache/commons/math3/userguide/geometry/EnclosingBallExample.java b/src/userguide/java/org/apache/commons/math3/userguide/geometry/EnclosingBallExample.java
index a2687a063..4293da80c 100644
--- a/src/userguide/java/org/apache/commons/math3/userguide/geometry/EnclosingBallExample.java
+++ b/src/userguide/java/org/apache/commons/math3/userguide/geometry/EnclosingBallExample.java
@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.apache.commons.math3.userguide.geometry;
 
 import java.awt.Color;