Answer: Turtle Challenge #143

Here’s what the code from Turtle Challenge #143 draws. This picture was made by running the code for real.

The answers

How many points will the star have? 12 points. The turtle draws 12 lines and makes a sharp point at every turn.

How far does the turtle turn altogether? 12 × 150 = 1800 degrees. That’s 5 whole turns, so the star closes up neatly.

How the code works

Turning by a big angle like 150 degrees makes the turtle cross back over its own lines, which makes a star instead of a plain shape. Because 12 × 150 is an exact number of full turns (5), the turtle ends up back at the start.

import turtle

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

for point in range(12):
    t.forward(180)
    t.left(150)

t.hideturtle()
turtle.done()