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import java.util.Scanner;
public class shw2point15 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Enter three points for a triangle:");
double x1 = input.nextDouble();
double y1 = input.nextDouble();
double x2 = input.nextDouble();
double y2 = input.nextDouble();
double x3 = input.nextDouble();
double y3 = input.nextDouble();
double s = ((x1 + y1) + (x2 + y2) + (x3 + y3)) / 2;
double area = Math.sqrt(s * (s - (x1 - y1)) * (s - (x2 - y2)) * (s - (x3 - y3)));
System.out.println("The area of the triangle is " + area);
}
}
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import java.util.Scanner;
class AreaOfTriangle3
{
public static void main(String args[])
{
Scanner s1= new Scanner(System.in);
System.out.println("Enter the 1st side:");
int a= s1.nextInt();
System.out.println("Enter the 2nd side:");
int b= s1.nextInt();
System.out.println("Enter the 3rd side:");
int c= s1.nextInt();
if((a+b)>c && (a+c)>b && (b+c)>a)
{
int s=(a+b+c)/2;
double area=Math.sqrt(s*(s-a)*(s-b)*(s-c));
System.out.println("Area of Triangle is: " + area);
}
else
System.out.println("Area of Triangle not exit");
}
}