Answer: Turtle Challenge #159

Here’s what the code from Turtle Challenge #159 draws. This picture was made by running the code for real.

The answers

How many points will the star have? 10 points. The turtle draws 10 lines and makes a sharp point at every turn.

How far does the turtle turn altogether? 10 × 108 = 1080 degrees. That’s 3 whole turns, so the star closes up neatly.

How the code works

Turning by a big angle like 108 degrees makes the turtle cross back over its own lines, which makes a star instead of a plain shape. Because 10 × 108 is an exact number of full turns (3), the turtle ends up back at the start.

import turtle

t = turtle.Turtle()
t.speed(0)
t.pensize(3)
t.pencolor("turquoise")

for point in range(10):
    t.forward(220)
    t.left(108)

t.hideturtle()
turtle.done()