Write a program to input three angles of a triangle and check whether a triangle is possible or not. If possible then check whether it is an acute-angled triangle, right-angled or an obtuse-angled triangle otherwise, display 'Triangle not possible'.

Sample Input: Enter three angles: 40, 50, 90
Sample Output: Right=angled Triangle

import java.util.Scanner;

public class KboatTriangleAngle
{
   public static void main(String args[]) {
       Scanner in = new Scanner(System.in);
       System.out.print("Enter first angle: ");
       int a1 = in.nextInt();
       System.out.print("Enter second angle: ");
       int a2 = in.nextInt();
       System.out.print("Enter third angle: ");
       int a3 = in.nextInt();
       int angleSum = a1 + a2 + a3;
       
       if (angleSum == 180 && a1 > 0 && a2 > 0 && a3 > 0) {
           if (a1 < 90 && a2 < 90 && a3 < 90) {
               System.out.println("Acute-angled Triangle");
           }
           else if (a1 == 90 || a2 == 90 || a3 == 90) {
               System.out.println("Right-angled Triangle");
           }
           else {
               System.out.println("Obtuse-angled Triangle");
           }
       }
       else {
           System.out.println("Triangle not possible");
       }
   }
}