I revised shapes code to make it work

2: function is a series of variables
By defining different functions and combine them, they could solve small problems specifically and then combine to fix the big problems that can be defined by a series of small problems
example: If you want to draw something complicated or design some games with many elements, you need to think the elements involved in it and define individual functions and combine them in a logical way to achieve it.

shapes.py

@@ -5,7 +5,23 @@
 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
+    penup()
+    goto(100,100)
+    pendown()
+    forward(width)
+    right(90)
+    forward(height)
+    right(90)
+    forward(width)
+    right(90)
+    forward(height)
+    right(90)