同一窗口用turtle库同时绘制等边三角形、叠加等边三角形、无角正方形、六角形。

可以使用以下代码绘制：

import turtle

# 绘制等边三角形
def draw_equilateral_triangle(size):
    for i in range(3):
        turtle.forward(size)
        turtle.left(120)

# 绘制叠加等边三角形
def draw_stacked_equilateral_triangles(size):
    turtle.penup()
    turtle.forward(size/2)
    turtle.left(60)
    turtle.pendown()
    for i in range(3):
        turtle.forward(size/2)
        turtle.right(120)
    turtle.penup()
    turtle.backward(size/2)
    turtle.right(60)
    turtle.pendown()
    for i in range(3):
        turtle.forward(size/2)
        turtle.left(120)

# 绘制无角正方形
def draw_square(size):
    for i in range(4):
        turtle.forward(size)
        turtle.left(90)

# 绘制六边形
def draw_hexagon(size):
    for i in range(6):
        turtle.forward(size)
        turtle.left(60)

# 画布设置
turtle.setup(width=800,height=600)
turtle.speed(0)
turtle.pensize(3)

# 绘制图形
draw_equilateral_triangle(200)
draw_stacked_equilateral_triangles(150)
draw_square(100)
draw_hexagon(100)

# 关闭画布
turtle.done()

不要忘记执行上述代码后打开 Turtle 窗口才能看到绘制结果。