9.8作业

1、

import turtle
turtle.circle(20)
turtle.up()
turtle.goto(0,-20)
turtle.down()
turtle.circle(40)
turtle.up()
turtle.goto(0,-40)
turtle.down()
turtle.circle(60)
turtle.up()
turtle.goto(0,-60)
turtle.down()
turtle.circle(80)

2、

import turtle
turtle.circle(20)
turtle.circle(30)
turtle.circle(40)
turtle.circle(50)
turtle.circle(60)

3、

import turtle

turtle.forward(50)

turtle.right(144)
turtle.forward(50)
turtle.right(144)
turtle.forward(50)
turtle.right(144)
turtle.forward(50)
turtle.right(144)
turtle.forward(50)
turtle.right(144)

4、

import turtle
turtle.bgcolor('red')
turtle.color('yellow')
turtle.fillcolor('yellow')
turtle.begin_fill()
turtle.forward(50)
turtle.right(144)
turtle.forward(50)
turtle.right(144)
turtle.forward(50)
turtle.right(144)
turtle.forward(50)
turtle.right(144)
turtle.forward(50)
turtle.right(144)
turtle.end_fill()