用turtle画各种各样的数学图形

ps，用turtle导入小海龟来画图。画图代码都要导入海龟库哦，见下面第一行。

import turtle as t

直线

# 画直线
def draw_line():pen = t.Pen()pen.fd(200) # 直线默认水平方向
draw_line()

画正方形

def draw_square():pen = t.Pen()for i in range(4): # 画四条等长直线pen.fd(200)pen.left(90)draw_square()

画长方形

def draw_rectangle():pen = t.Pen()for i in range(2): # 一长一宽画两遍pen.fd(100)pen.left(90)pen.fd(200)pen.left(90)draw_rectangle()

三角形

def triangle():pen = t.Pen()for i in range(3):pen.fd(200)pen.left(120)
triangle()

画圆

# 画圆
def draw_circle():pen = t.Pen()pen.circle(100) # 半径两百draw_circle()

画四个相交的圆

def draw_intersect_circle():pen = t.Pen()for i in range(2): # 先画上下，再画左右pen.circle(100)pen.circle(-100)pen.left(90)draw_intersect_circle()

五边形

def pentagon():pen = t.Pen()for i in range(5):pen.fd(100)pen.right(72)
pentagon()

五角星

def pentacle():pen = t.Pen()for i in range(5):pen.fd(100)pen.left(216)pentacle()

四边形

def draw_quadrangle():pen = t.Pen()for i in range(2): # 画两次pen.fd(200)          pen.left(45) pen.fd(150)         pen.left(135)draw_quadrangle()

正六边形

# 六边形的偏转度数60
def draw_hexagon():pen = t.Pen()for i in range(6):pen.fd(150)pen.left(60)draw_hexagon()

画各种正n边形系列

算出n变形要偏转的角度
把n变形切成三角形（180）+四边形（360），得到总角度
拿总的角度/边数就是偏转的角度

画大奔


#turtle 的背景颜色
t.bgcolor("red")
def draw_gallop():pen = t.Pen()# 笔的宽度pen.width(5)# 笔的颜色pen.pencolor('pink')pen.left(95)pen.fd(200)for i in range(3):pen.left(170)pen.fd(200)pen.left(310)pen.fd(200)pen.left(85)pen.circle(210)draw_gallop()
```![](https://img-blog.csdnimg.cn/20200526220837354.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NzgzMjgz,size_16,color_FFFFFF,t_70)