Done

.envrc

@@ -0,0 +1 @@
+source .venv/bin/activate

circle_area.py

@@ -4,3 +4,7 @@
 
 print("This program will calculate the area of a circle.")
 radius = float(input("What is the circle's radius? "))
+pi = 3.141592653
+circle_area = pi * radius * radius
+print("The circle's area is")
+print(circle_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)

shapes.py

@@ -5,7 +5,20 @@
 from turtle import *
 
 def triangle(side_length):
-    pass
+    forward(side_length)
+    right(120)
+    forward(side_length)
+    right(120)
+    forward(side_length)
+    right(120)
 
 def rectangle(height, width):
-    pass
+    forward(width)
+    right(90)
+    forward(height)
+    right(90)
+    forward(width)
+    right(90)
+    forward(height)
+    right(90)
+

square.py

@@ -0,0 +1,18 @@
+from turtle import forward, right
+
+def square(size):
+    forward(size)
+    right(45)
+    forward(size)
+    right(45)
+    forward(size)
+    right(45)
+    forward(size)
+    right(45)
+
+square(10)
+forward(100)
+square(50)
+forward(100)
+square(100)
+input()