Answer: Turtle Challenge #148

Here’s what the code from Turtle Challenge #148 draws. This picture was made by running the code for real.

The answers

How many points will the star have? 20 points. The turtle draws 20 lines and makes a sharp point at every turn.

How far does the turtle turn altogether? 20 × 126 = 2520 degrees. That’s 7 whole turns, so the star closes up neatly.

How the code works

Turning by a big angle like 126 degrees makes the turtle cross back over its own lines, which makes a star instead of a plain shape. Because 20 × 126 is an exact number of full turns (7), the turtle ends up back at the start.

import turtle

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

for point in range(20):
    t.forward(220)
    t.left(126)

t.hideturtle()
turtle.done()