diff --git a/Smart_Calculator/calculator.py b/Smart_Calculator/calculator.py
index 2c46b4eb..32a23d13 100644
--- a/Smart_Calculator/calculator.py
+++ b/Smart_Calculator/calculator.py
@@ -1,4 +1,6 @@
 from tkinter import *
+PI = 3.14159
+
 
 def add(a,b):
     return a + b
@@ -58,6 +60,21 @@ def calculate():
             list.delete(0,END)
             list.insert(END,'something went wrong please enter again')
 
+
+def fact(n):
+    if n == 1 or n == 0:
+        return 1
+    return n * fact(n - 1)
+
+
+def circle_area(radius):
+    return PI * (radius ** 2)
+
+
+def circle_perimeter(radius):
+    return PI * radius * 2
+    
+
 operations = {'ADD':add,'ADDITION':add, 'SUM':add, 'PLUS':add,
             'SUB':sub, 'DIFFERENCE':sub, 'MINUS': sub, 'SUBTRACT':sub, 'DIFF':sub,
             'LCM':lcm, 'HCF':hcf, 'PRODUCT':mul, 'MULTIPLICATION':mul,
diff --git a/Smart_Calculator/calculator_test.py b/Smart_Calculator/calculator_test.py
index e44e858c..78b53ccf 100644
--- a/Smart_Calculator/calculator_test.py
+++ b/Smart_Calculator/calculator_test.py
@@ -30,4 +30,4 @@ def test_hcf_function(self):
         self.assertEqual(hcf(54, 24), 6)
 
 if __name__ == '__main__':
-    unittest.main(verbosity=2)
\ No newline at end of file
+    unittest.main(verbosity=2)
diff --git a/Triangle Calculator/TriangleCalculator.py b/Triangle Calculator/TriangleCalculator.py
index def30492..fcaf8590 100644
--- a/Triangle Calculator/TriangleCalculator.py	
+++ b/Triangle Calculator/TriangleCalculator.py	
@@ -8,4 +8,9 @@
 #Calculate the area
 area=(sp*(sp-s1)*(sp-s2)*(sp-s3))**0.5
 
-print('The area of the triangle is %0.4f'%area)
\ No newline at end of file
+#Calculate the perimeter
+perimeter = s1 + s2 + s3
+
+print('The area of the triangle is %0.4f'%area)
+
+print('The perimeter of the triangle is %0.4f'%perimeter)