Check out example codes for "check if 2 circles intersect". It will help you in understanding the concepts better.

Code Example 1

// Java program to check if two  
// circles touch each other or not. 
import java.io.*; 
  
class GFG  
{ 
    static int circle(int x1, int y1, int x2,  
                      int y2, int r1, int r2) 
    { 
        int distSq = (x1 - x2) * (x1 - x2) + 
                     (y1 - y2) * (y1 - y2); 
        int radSumSq = (r1 + r2) * (r1 + r2); 
        if (distSq == radSumSq) 
            return 1; 
        else if (distSq > radSumSq) 
            return -1; 
        else
            return 0; 
    } 
  
    // Driver code 
    public static void main (String[] args)  
    { 
        int x1 = -10, y1 = 8; 
        int x2 = 14, y2 = -24; 
        int r1 = 30, r2 = 10; 
        int t = circle(x1, y1, x2,  
                       y2, r1, r2); 
        if (t == 1) 
            System.out.println ( "Circle touch to" + 
                                 " each other."); 
        else if (t < 0) 
            System.out.println ( "Circle not touch" + 
                                 " to each other."); 
        else
            System.out.println ( "Circle intersect" + 
                                 " to each other."); 
              
    } 
} 
  
// This article is contributed by vt_m.

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