diff --git a/src/main/java/pythagoras/d/AbstractRectangle.java b/src/main/java/pythagoras/d/AbstractRectangle.java
index 1467650..2b775f7 100644
--- a/src/main/java/pythagoras/d/AbstractRectangle.java
+++ b/src/main/java/pythagoras/d/AbstractRectangle.java
@@ -108,7 +108,7 @@ public abstract class AbstractRectangle extends RectangularShape implements IRec
 
         px -= x;
         py -= y;
-        return px < width() && py < height();
+        return px <= width() && py <= height();
     }
 
     @Override // from interface IShape
diff --git a/src/main/java/pythagoras/f/AbstractRectangle.java b/src/main/java/pythagoras/f/AbstractRectangle.java
index c62c440..c22ff48 100644
--- a/src/main/java/pythagoras/f/AbstractRectangle.java
+++ b/src/main/java/pythagoras/f/AbstractRectangle.java
@@ -108,7 +108,7 @@ public abstract class AbstractRectangle extends RectangularShape implements IRec
 
         px -= x;
         py -= y;
-        return px < width() && py < height();
+        return px <= width() && py <= height();
     }
 
     @Override // from interface IShape