working on the triangle logic

circle_area.py

@@ -3,4 +3,6 @@
 # By MWC Contributors
 
 print("This program will calculate the area of a circle.")
-radius = float(input("What is the circle's radius? "))
+radius = float(input("What is the circle's radius?"))
+area = 3.14*radius*radius
+print(area)

greetings.py

@@ -2,6 +2,6 @@
 # ------------
 # By MWC contributors
 
-my_name ="Chris"
+my_name = input("what is your name? ")
 greeting = "Hello, " + my_name
-print(greeting)
+print(greeting) 

shapes.py

@@ -5,7 +5,13 @@
 from turtle import *
 
 def triangle(side_length):
-    pass
+    right(45)
-
+    forward(side_length)
+    right(45)
+    forward(side_length)
+    right(45)
+    forward(side_length)
+    right(45)
+    
 def rectangle(height, width):
     pass