diff --git a/陈安-26020007005-261067224.py b/陈安-26020007005-261067224.py
index 9400ab9..0c5be60 100644
--- a/陈安-26020007005-261067224.py
+++ b/陈安-26020007005-261067224.py
@@ -6,4 +6,9 @@ class Circle(area):
     def __init__(self, r):
         self.r = r
     def area(self):
-        return 3.14 * self.r * self.r
\ No newline at end of file
+        return 3.14 * self.r * self.r
+class Square(area):
+    def __init__(self, side):
+        self.side = side
+    def area(self):
+        return self.side * self.side
\ No newline at end of file