1. Write a program to input three angles of a triangle and check whether its construction is possible or not. If possible then check and display whether it is an acute-angled triangle, right-angled or an obtuse-angled triangle. Otherwise, display A Triangle is not possible'. Sample Input: Enter three angles: 40, 50, 90 Sample Output: Right-Angled Triangle.
Answers
Answer:
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");
}
}
}
Explanation: