diff -r 55b4c97d44c5 -r 5411a25cfca7 geometry.py
--- a/geometry.py	Sun Dec 10 15:37:26 2017 +0200
+++ b/geometry.py	Sun Dec 10 15:45:50 2017 +0200
@@ -18,6 +18,12 @@
     def __repr__(self):
         return str.format('LineSegment({!r}, {!r})', self.v1, self.v2)
 
+class Polygon:
+    def __init__(self, vertices):
+        self.vertices = vertices
+    def __repr__(self):
+        return str.format('Polygon({!r})', self.vertices)
+
 def is_real(number):
     return isinstance(number, int) or isinstance(number, float)