/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
	}
}

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import turtle

turtle.setup(800, 600)  
turtle.speed(10)    
turtle.bgcolor("black")
turtle.color("red", "pink")
turtle.begin_fill()
turtle.left(140)
turtle.forward(180)
turtle.circle(-90, 200)
turtle.setheading(60)  
turtle.circle(-90, 200)
turtle.forward(184)
turtle.end_fill()
turtle.penup()
turtle.goto(-130, -180)
turtle.color("white")
turtle.write("r = a(1-sinθ)", font=("Arial", 30, "bold"))

turtle.done()