import turtle
t = turtle.Turtle()
t.goto(0, 180)

import turtle
t = turtle.Turtle()
t.setx(0)
t.sety(180)

import turtle
t = turtle.Turtle()
# 初始朝向为x轴正方向
t.forward(240)
t.left(90)
t.forward(180)

import turtle
t = turtle.Turtle()
t.goto(180, 0)