import turtle
import math
import time



#定义多个点

x1,y1 = 100, 100
x2,y2 = 100,-100
x3,y3 = -100,-100
x4,y4 = -100,100

#绘制折线

turtle.penup()
turtle.goto(x1,y1)
turtle.pendown()
turtle.goto(x2,y2)
turtle.goto(x3,y3)
turtle.goto(x4,y4)

#计算起始点与终点的距离
distance = math.sqrt((x1-x4)**2 + (y1-y4)**2)
turtle.write(distance)
print(distance)

time.sleep(5)

