diff --git a/thinkcspy/Chapter-17-Exercises/points.py b/thinkcspy/Chapter-17-18-Exercises/points.py
similarity index 96%
rename from thinkcspy/Chapter-17-Exercises/points.py
rename to thinkcspy/Chapter-17-18-Exercises/points.py
index e53171d..f7fc7b3 100644
--- a/thinkcspy/Chapter-17-Exercises/points.py
+++ b/thinkcspy/Chapter-17-18-Exercises/points.py
@@ -77,7 +77,7 @@ class Point:
     def __str__(self):
         return "x=" + str(self.x) + ", y=" + str(self.y)
 
-p = Point(7, 6)
-q = Point(10, 3)
-z = Point(8, 5)
-print(p.findCenterRadius(q, z))
+# p = Point(7, 6)
+# q = Point(10, 3)
+# z = Point(8, 5)
+# print(p.findCenterRadius(q, z))
diff --git a/thinkcspy/Chapter-17-18-Exercises/rectangle.py b/thinkcspy/Chapter-17-18-Exercises/rectangle.py
new file mode 100644
index 0000000..c426331
--- /dev/null
+++ b/thinkcspy/Chapter-17-18-Exercises/rectangle.py
@@ -0,0 +1,4 @@
+from points import Point
+
+a = Point(5, 6)
+print(a)
\ No newline at end of file