diff --git a/src/main/java/pythagoras/d/IRectangularShape.java b/src/main/java/pythagoras/d/IRectangularShape.java
index 51fa0fe..be4a6c2 100644
--- a/src/main/java/pythagoras/d/IRectangularShape.java
+++ b/src/main/java/pythagoras/d/IRectangularShape.java
@@ -23,18 +23,27 @@ public interface IRectangularShape extends IShape
     /** Returns the height of the framing rectangle. */
     double getHeight ();
 
+    /** Returns the minimum x,y-coordinate of the framing rectangle. */
+    Point getMin ();
+
     /** Returns the minimum x-coordinate of the framing rectangle. */
     double getMinX ();
 
     /** Returns the minimum y-coordinate of the framing rectangle. */
     double getMinY ();
 
+    /** Returns the maximum x,y-coordinate of the framing rectangle. */
+    Point getMax ();
+
     /** Returns the maximum x-coordinate of the framing rectangle. */
     double getMaxX ();
 
     /** Returns the maximum y-coordinate of the framing rectangle. */
     double getMaxY ();
 
+    /** Returns the center of the framing rectangle. */
+    Point getCenter ();
+
     /** Returns the x-coordinate of the center of the framing rectangle. */
     double getCenterX ();
 
diff --git a/src/main/java/pythagoras/d/RectangularShape.java b/src/main/java/pythagoras/d/RectangularShape.java
index de70305..3e2951e 100644
--- a/src/main/java/pythagoras/d/RectangularShape.java
+++ b/src/main/java/pythagoras/d/RectangularShape.java
@@ -80,6 +80,12 @@ public abstract class RectangularShape implements IRectangularShape
         setFrameFromCenter(center.getX(), center.getY(), corner.getX(), corner.getY());
     }
 
+    @Override // from IRectangularShape
+    public Point getMin ()
+    {
+        return new Point(getMinX(), getMinY());
+    }
+
     @Override // from IRectangularShape
     public double getMinX () {
         return getX();
@@ -90,6 +96,12 @@ public abstract class RectangularShape implements IRectangularShape
         return getY();
     }
 
+    @Override // from IRectangularShape
+    public Point getMax ()
+    {
+        return new Point(getMaxX(), getMaxY());
+    }
+
     @Override // from IRectangularShape
     public double getMaxX () {
         return getX() + getWidth();
@@ -100,6 +112,12 @@ public abstract class RectangularShape implements IRectangularShape
         return getY() + getHeight();
     }
 
+    @Override // from IRectangularShape
+    public Point getCenter ()
+    {
+        return new Point(getCenterX(), getCenterY());
+    }
+
     @Override // from IRectangularShape
     public double getCenterX () {
         return getX() + getWidth() / 2;
diff --git a/src/main/java/pythagoras/f/IRectangularShape.java b/src/main/java/pythagoras/f/IRectangularShape.java
index 5b3fdae..037b5f9 100644
--- a/src/main/java/pythagoras/f/IRectangularShape.java
+++ b/src/main/java/pythagoras/f/IRectangularShape.java
@@ -23,18 +23,27 @@ public interface IRectangularShape extends IShape
     /** Returns the height of the framing rectangle. */
     float getHeight ();
 
+    /** Returns the minimum x,y-coordinate of the framing rectangle. */
+    Point getMin ();
+
     /** Returns the minimum x-coordinate of the framing rectangle. */
     float getMinX ();
 
     /** Returns the minimum y-coordinate of the framing rectangle. */
     float getMinY ();
 
+    /** Returns the maximum x,y-coordinate of the framing rectangle. */
+    Point getMax ();
+
     /** Returns the maximum x-coordinate of the framing rectangle. */
     float getMaxX ();
 
     /** Returns the maximum y-coordinate of the framing rectangle. */
     float getMaxY ();
 
+    /** Returns the center of the framing rectangle. */
+    Point getCenter ();
+
     /** Returns the x-coordinate of the center of the framing rectangle. */
     float getCenterX ();
 
diff --git a/src/main/java/pythagoras/f/RectangularShape.java b/src/main/java/pythagoras/f/RectangularShape.java
index 0ef2aa8..2ea57e2 100644
--- a/src/main/java/pythagoras/f/RectangularShape.java
+++ b/src/main/java/pythagoras/f/RectangularShape.java
@@ -80,6 +80,12 @@ public abstract class RectangularShape implements IRectangularShape
         setFrameFromCenter(center.getX(), center.getY(), corner.getX(), corner.getY());
     }
 
+    @Override // from IRectangularShape
+    public Point getMin ()
+    {
+        return new Point(getMinX(), getMinY());
+    }
+
     @Override // from IRectangularShape
     public float getMinX () {
         return getX();
@@ -90,6 +96,12 @@ public abstract class RectangularShape implements IRectangularShape
         return getY();
     }
 
+    @Override // from IRectangularShape
+    public Point getMax ()
+    {
+        return new Point(getMaxX(), getMaxY());
+    }
+
     @Override // from IRectangularShape
     public float getMaxX () {
         return getX() + getWidth();
@@ -100,6 +112,12 @@ public abstract class RectangularShape implements IRectangularShape
         return getY() + getHeight();
     }
 
+    @Override // from IRectangularShape
+    public Point getCenter ()
+    {
+        return new Point(getCenterX(), getCenterY());
+    }
+
     @Override // from IRectangularShape
     public float getCenterX () {
         return getX() + getWidth() / 2;
diff --git a/src/main/java/pythagoras/i/IRectangle.java b/src/main/java/pythagoras/i/IRectangle.java
index a0641ab..899eaa9 100644
--- a/src/main/java/pythagoras/i/IRectangle.java
+++ b/src/main/java/pythagoras/i/IRectangle.java
@@ -42,12 +42,12 @@ public interface IRectangle extends IShape, Cloneable
     int getMinY ();
 
     /** Returns the maximum x-coordinate of the framing rectangle. <em>Note:</em> this method
-     * differs from its inting-point counterparts in that it considers {@code (x + width - 1)} to
+     * differs from its floating-point counterparts in that it considers {@code (x + width - 1)} to
      * be a rectangle's maximum x-coordinate. */
     int getMaxX ();
 
     /** Returns the maximum y-coordinate of the framing rectangle. <em>Note:</em> this method
-     * differs from its inting-point counterparts in that it considers {@code (y + height - 1)}
+     * differs from its floating-point counterparts in that it considers {@code (y + height - 1)}
      * to be a rectangle's maximum x-coordinate. */
     int getMaxY ();