HW3.27

 import java.util.Scanner;

 public class Solution
 {
     public static void main(String[] args)
     {
         Scanner input = new Scanner(System.in);

         System.out.println("Enter a point's x- and y-coordinates: ");
         double x = input.nextDouble();
         double y = input.nextDouble();

         input.close();

         if(x >= 0 && x <= 200 && y >= 0 && y <= -0.5 * x + 100)
             System.out.println("The point is in the triangle");
         else
             System.out.println("The point is not in the triangle");
     }
 }