import math
from TurtleWorld import *
world = TurtleWorld()
t = Turtle()
t.delay = 0.01

def polygon(t, n):
    length = 10
    degree = 360 / n;
    pd(t)
    for i in range(int(n)):
        fd(t, length)
        lt(t, degree)

def circle(t, r):
    circumference = r * 2 * math.pi
    n = circumference / 10
    polygon(t, n)