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Draw Circle in Python using Turtle

  • Difficulty Level : Hard
  • Last Updated : 06 Aug, 2021

Turtle is a Python feature like a drawing board, which lets us command a turtle to draw all over it! We can use functions like turtle.forward(…) and turtle.right(…) which can move the turtle around. Turtle is a beginner-friendly way to learn Python by running some basic commands and viewing the turtle do it graphically. It is like a drawing board that allows you to draw over it. The turtle module can be used in both object-oriented and procedure-oriented ways.
To draw, Python turtle provides many functions and methods i.e. forward, backward, etc. Some the commonly used methods are:

  • forward(x): moves the pen in the forward direction by x unit.
  • backward(x): moves the pen in the backward direction by x unit.
  • right(x): rotate the pen in the clockwise direction by an angle x.
  • left(x): rotate the pen in the anticlockwise direction by an angle x.
  • penup(): stop drawing of the turtle pen.
  • pendown(): start drawing of the turtle pen.

Now to draw a circle using turtle, we will use a predefined function in “turtle”.
circle(radius): This function draws a circle of the given radius by taking the “turtle” position as the center.
Example:
 

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Python3






# Python program to demonstrate
# circle drawing
  
  
import turtle
    
# Initializing the turtle
t = turtle.Turtle()
  
  
r = 50
t.circle(r)

Output :
 

 

Tangent Circles

A tangent is a line that touches the circumference of a circle from outside at a point, provided that any extension of the line will not cause intersection with the circle. Now, think about a group of circles, that have a common tangent. The group of circles, having common tangent, are known as tangent circles.
Example:
 

Python3




# Python program to demonstrate
# tangent circle drawing
  
  
import turtle
    
t = turtle.Turtle()
  
# radius for smallest circle
r = 10
  
# number of circles
n = 10
  
# loop for printing tangent circles
for i in range(1, n + 1, 1):
    t.circle(r * i)

Output :
 

 



Spiral Circle

Spiral is a shape similar to a circle, except that the radius of the spiral gradually increases after every completed round.
Example:
 

Python3




# Python program to demonstrate
# spiral circle drawing
  
  
import turtle
    
t = turtle.Turtle()
  
# taking radius of initial radius
r = 10
  
# Loop for printing spiral circle
for i in range(100):
    t.circle(r + i, 45)

Output : 
 

 

Cocentric Circles

The term concentric is used for a group of things having common. Now Circles having the same center are termed as Concentric Circle.
 

Python3




# Python program to demonstrate
# concentric circle drawing
  
  
import turtle
    
      
t = turtle.Turtle()
  
# radius of the circle
r = 10
  
# Loop for printing concentric circles
for i in range(50):
    t.circle(r * i)
    t.up()
    t.sety((r * i)*(-1))
    t.down()

Output :
 




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