work11_1

import turtle
import math
t = turtle.Turtle()
t.shape('turtle')
R = 30
x = 1
n = 3
t.up()
t.goto(R, 0)
t.down()
def polygon(x):
    while x <= n:
        t.left((180 - 360 / n) / 2)
        t.left(360 / n)
        t.forward(2 * R * math.sin(math.pi/n))
        x += 1
        t.right((180 - 360 / n) / 2)
while n <= 11:
    polygon(x)
    n += 1
    R += 18
    t.up()
    t.goto(R, 0)
    t.down()
turtle.exitonclick()