======================
Challenges 1
======================

Each of these can be done in 4 lines of code, and one is ``import turtle``.

Do these challenges in the Python IDLE editor. 
You will first have to do sheet `Writing your own programs using IDLE`__

.. __: idle.html

In only 4 lines of code (each). Only the 1st need be 4 lines, the others can be 3 lines, as you only have to do ``import turtle`` once.

  If for each shape we end up where we start, and facing the same way. Then how many times do we turn? What is that in degrees?
  So for a square we do that in 4 chunks. That is ``360/4``. What would it be for a triangle, for a hexagon …

* Draw a square
* Draw a triangle
* Draw a hexagon
* Draw a 20 gon (that is a 20 sided shape).

..
  
  What would happen if instead of turning 360°, we turned 2×360°? (in python that is ``2*360``).

Try some shapes with 5,7,8,9 … sides where the turtle turns 2×360°, or 3×360° or …

How do you need to change ``360/n`` where ``n`` is the number of sides.


