作业

1. 画一组同切圆

import turtle

turtle.circle(30)

turtle.circle(50)

turtle.circle(70)

turtle.circle(90)

2. 画一组同心圆

import turtle
turtle.shape('turtle')
turtle.circle(30)
turtle.up()
turtle.goto(0,-20)
turtle.down()
turtle.circle(50)
turtle.up()
turtle.goto(0,-40)
turtle.down()
turtle.circle(70)
turtle.up()
turtle.goto(0,-60)
turtle.down()
turtle.circle(90)
turtle.up()
turtle.goto(0,-80)
turtle.down()

3.画一个五角星

import turtle

turtle.forward(70)
turtle.right(144)
turtle.forward(70)
turtle.right(144)
turtle.forward(70)
turtle.right(144)
turtle.forward(70)
turtle.right(144)
turtle.forward(70)

4.画一个黄色实心五角星

import turtle
turtle.color('yellow')
turtle.fillcolor('yellow')
turtle.begin_fill()
turtle.forward(70)
turtle.right(144)
turtle.forward(70)
turtle.right(144)
turtle.forward(70)
turtle.right(144)
turtle.forward(70)
turtle.right(144)
turtle.forward(70)
turtle.end_fill()
turtle.bgcolor('red')