5.13. ðŸ¤” Drawing a Circle with the TurtleÂ¶
Suppose that we want our turtle to draw a circle, the circle should have a certain radius that the user can supply and then the turtle can draw one from the current location of the turtle.
Drawing a circle may sound like a real challenge, but here is another example of a problem solving exercise where you can start simple work out a few cases with paper and pencil in order to see the pattern. Once you see the pattern then you can generalize your solution.
To begin lets think of a simpler shape we can have the turtle draw such as a triangle, and since a radius doesnâ€™t really make a lot of sense for a triangle lets suppose that the user supplies us with the length of the side for a triangle.
Now there are a couple of jumps we need to make:
 Although we think of a circle as being perfectly round, we canâ€™t really achieve that on a computer screen. So our circle will be an approximation of a circle. In fact you have probably already noticed that the octagon looks a lot more circleish than the triangle did. So we will approximate our turtle by making a polygon with a lot of sides.
 How did you figure out how far to make the turtle turn for the triangle, square, and octagon?
to make the leap to drawing our approximate circle we will need to figure out how many sides we need how long those sides should be and how much to turn. Depending on the order you answer the questions, you may get a different final program. Remember that you can always do a little experiementing to see what looks good, you donâ€™t have to have the perfect answer on the first try, and its OK to use an assumption for one of the answers to the three questions.
Bonus
Post Project Questions

During this project I was primarily in my...
 Comfort Zone
 Learning Zone
 Panic Zone

Completing this project took...
 Very little time
 A reasonable amount of time
 More time than is reasonable

Based on my own interests and needs, the things taught in this project...
 Don't seem worth learning
 May be worth learning
 Are definitely worth learning

For me to master the things taught in this project feels...
 Definitely within reach
 Within reach if I try my hardest
 Out of reach no matter how hard I try