What is the circle method in python?

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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:
 

Python3

import 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

import turtle

t = turtle.Turtle[]

r = 10

n = 10

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

import turtle

t = turtle.Turtle[]

r = 10

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

import turtle

t = turtle.Turtle[]

r = 10

for i in range[50]:

    t.circle[r * i]

    t.up[]

    t.sety[[r * i]*[-1]]

    t.down[]

Output :